Preload Not Working

Preload is not working, it says at the top once enabled preload will run in 10 seconds but no cache files are created.
I am running the site on a VPS, I’ve read others with problems when run on a VPS.

Is there a solution at all, please?

Thanks

Debug file:-

Exclude requests:
wp-admin
wp-content
wp-json

Text to filter by:

Exclude by filter instead of include.
20:56:15 30249 /wp-admin/options-general.php?page=wpsupercache&tab=debug wp_cache_get_cookies_values: /^wp-postpass_|^comment_author_|^wordpress_logged_in_/ Cookie detected: wordpress_logged_in_a4671dd8adac8c0a7e926614cee3748a
20:56:15 30249 /wp-admin/options-general.php?page=wpsupercache&tab=debug wp_cache_get_cookies_values: return: 45305494b34d0ffc04b63be4eeecd51f
20:56:15 30249 /wp-admin/options-general.php?page=wpsupercache&tab=debug Caching disabled for logged in users on settings page.
20:56:16 30249 /wp-admin/options-general.php?page=wpsupercache&tab=debug wp_cache_get_cookies_values: cached: 45305494b34d0ffc04b63be4eeecd51f
20:56:16 30249 /wp-admin/options-general.php?page=wpsupercache&tab=debug wp_cache_check_mobile: https://www.thecandleboutique.co.uk44345305494b34d0ffc04b63be4eeecd51f
20:56:16 30249 /wp-admin/options-general.php?page=wpsupercache&tab=debug In WP Cache Phase 2
20:56:16 30249 /wp-admin/options-general.php?page=wpsupercache&tab=debug Setting up WordPress actions
20:56:16 30249 /wp-admin/options-general.php?page=wpsupercache&tab=debug Not caching wp-admin requests.
20:56:22 30254 /product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/ wp_cache_get_cookies_values: return:
20:56:22 30254 /product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/ wp_cache_get_cookies_values: return:
20:56:22 30254 /product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/ wp_cache_check_mobile: https://www.thecandleboutique.co.uk443/product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/
20:56:22 30254 /product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/ mobile browser detected: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
20:56:22 30254 /product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/ supercache dir: /home/thecandl/public_html/wp-content/cache/supercache/www.thecandleboutique.co.uk/product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/
20:56:22 30254 /product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/ wp_cache_check_mobile: -https
20:56:22 30254 /product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/ mobile browser detected: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
20:56:22 30254 /product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/ wp_cache_get_cookies_values: return:
20:56:22 30254 /product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/ Fetched static page data from supercache file using PHP. File: /home/thecandl/public_html/wp-content/cache/supercache/www.thecandleboutique.co.uk/product-category/scentsy-warmers-diffusers-and-more/scentsy-warmers/view-all-scentsy-uk-warmers/index-https-mobile.html
20:56:23 30255 /?wc-ajax=get_refreshed_fragments wp_cache_get_cookies_values: return:
20:56:24 30255 /?wc-ajax=get_refreshed_fragments wp_cache_get_cookies_values: return:
20:56:24 30255 /?wc-ajax=get_refreshed_fragments wp_cache_check_mobile: https://www.thecandleboutique.co.uk443
20:56:24 30255 /?wc-ajax=get_refreshed_fragments mobile browser detected: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
20:56:24 30255 /?wc-ajax=get_refreshed_fragments In WP Cache Phase 2
20:56:24 30255 /?wc-ajax=get_refreshed_fragments Setting up WordPress actions
20:56:24 30255 /?wc-ajax=get_refreshed_fragments Supercache caching disabled. Only using wp-cache. Non empty GET request. {“wc-ajax”:”get_refreshed_fragments”}
20:56:24 30255 /?wc-ajax=get_refreshed_fragments Created output buffer
20:56:24 30255 /?wc-ajax=get_refreshed_fragments DONOTCACHEPAGE defined. Caching disabled.
20:56:24 30255 /?wc-ajax=get_refreshed_fragments wp_cache_maybe_dynamic: returned $buffer
20:56:26 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 wp_cache_get_cookies_values: return:
20:56:26 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 wp_cache_get_cookies_values: return:
20:56:26 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 wp_cache_check_mobile: https://www.thecandleboutique.co.uk443/?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204
20:56:26 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 mobile browser detected: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
20:56:26 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 supercache dir: /home/thecandl/public_html/wp-content/cache/supercache/www.thecandleboutique.co.uk/
20:56:26 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 wp_cache_check_mobile: -https
20:56:26 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 mobile browser detected: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
20:56:26 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 GET array not empty. Cannot serve a supercache file. {“wordfence_lh”:”1″,”hid”:”EED40C13B27F4FBCC0FBF0BE94CADD37″,”r”:”0.44478349070829204″}
20:56:27 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 wp_cache_get_cookies_values: return:
20:56:27 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 wp_cache_check_mobile: https://www.thecandleboutique.co.uk443/?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204
20:56:27 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 mobile browser detected: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
20:56:27 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 In WP Cache Phase 2
20:56:27 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 Setting up WordPress actions
20:56:27 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 Supercache caching disabled. Only using wp-cache. Non empty GET request. {“wordfence_lh”:”1″,”hid”:”EED40C13B27F4FBCC0FBF0BE94CADD37″,”r”:”0.44478349070829204″}
20:56:27 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 Created output buffer
20:56:28 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 Output buffer callback
20:56:28 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 Buffer is blank. Output buffer may have been corrupted by another plugin or this is a redirected URL. Look for text ‘ob_start’ in the files of your plugins directory.
20:56:28 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 https://www.thecandleboutique.co.uk/?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 – Page not cached by WP Super Cache. Blank Page. Check output buffer usage by plugins.
20:56:28 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 No closing html tag. Not caching.
20:56:28 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 https://www.thecandleboutique.co.uk/?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 – Page not cached by WP Super Cache. No closing HTML tag. Check your theme.
20:56:28 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 wp_cache_maybe_dynamic: returned $buffer
20:56:28 30258 /?wordfence_lh=1&hid=EED40C13B27F4FBCC0FBF0BE94CADD37&r=0.44478349070829204 wp_cache_shutdown_callback: No cache file created. Returning.
20:56:38 30264 /product/stargaze-scentsy-diffuser/ wp_cache_get_cookies_values: return:
20:56:38 30264 /product/stargaze-scentsy-diffuser/ wp_cache_get_cookies_values: return:
20:56:38 30264 /product/stargaze-scentsy-diffuser/ wp_cache_check_mobile: https://www.thecandleboutique.co.uk443/product/stargaze-scentsy-diffuser/
20:56:38 30264 /product/stargaze-scentsy-diffuser/ mobile browser detected: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
20:56:38 30264 /product/stargaze-scentsy-diffuser/ supercache dir: /home/thecandl/public_html/wp-content/cache/supercache/www.thecandleboutique.co.uk/product/stargaze-scentsy-diffuser/
20:56:38 30264 /product/stargaze-scentsy-diffuser/ wp_cache_check_mobile: -https
20:56:38 30264 /product/stargaze-scentsy-diffuser/ mobile browser detected: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
20:56:38 30264 /product/stargaze-scentsy-diffuser/ No Super Cache file found for current URL: /home/thecandl/public_html/wp-content/cache/supercache/www.thecandleboutique.co.uk/product/stargaze-scentsy-diffuser/index-https-mobile.html
20:56:39 30264 /product/stargaze-scentsy-diffuser/ wp_cache_get_cookies_values: return:
20:56:39 30264 /product/stargaze-scentsy-diffuser/ wp_cache_check_mobile: https://www.thecandleboutique.co.uk443/product/stargaze-scentsy-diffuser/
20:56:39 30264 /product/stargaze-scentsy-diffuser/ mobile browser detected: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
20:56:39 30264 /product/stargaze-scentsy-diffuser/ In WP Cache Phase 2
20:56:39 30264 /product/stargaze-scentsy-diffuser/ Setting up WordPress actions
20:56:39 30264 /product/stargaze-scentsy-diffuser/ Created output buffer
20:56:39 30264 /product/stargaze-scentsy-diffuser/ wp_cache_get_cookies_values: return:
20:56:39 30264 /product/stargaze-scentsy-diffuser/ wpcache_do_rebuild: doing rebuild for /home/thecandl/public_html/wp-content/cache/supercache/www.thecandleboutique.co.uk/product/stargaze-scentsy-diffuser/
20:56:39 30264 /product/stargaze-scentsy-diffuser/ wpcache_do_rebuild: exiting as directory is not a directory: /home/thecandl/public_html/wp-content/cache/supercache/www.thecandleboutique.co.uk/product/stargaze-scentsy-diffuser/
20:56:41 30264 /product/stargaze-scentsy-diffuser/ Output buffer callback
20:56:41 30264 /product/stargaze-scentsy-diffuser/ wp_cache_get_cookies_values: return:
20:56:41 30264 /product/stargaze-scentsy-diffuser/ Anonymous user detected. Only creating Supercache file.
20:56:41 30264 /product/stargaze-scentsy-diffuser/ wp_cache_get_cookies_values: return:
20:56:41 30264 /product/stargaze-scentsy-diffuser/ wp_cache_get_cookies_values: return:
20:56:41 30264 /product/stargaze-scentsy-diffuser/ wp_cache_check_mobile: -https
20:56:41 30264 /product/stargaze-scentsy-diffuser/ mobile browser detected: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
20:56:41 30264 /product/stargaze-scentsy-diffuser/ Gzipping buffer.
20:56:41 30264 /product/stargaze-scentsy-diffuser/ Writing non-gzipped buffer to supercache file.
20:56:41 30264 /product/stargaze-scentsy-diffuser/ Writing gzipped buffer to supercache file.
20:56:41 30264 /product/stargaze-scentsy-diffuser/ Renamed temp supercache file to /home/thecandl/public_html/wp-content/cache/supercache/www.thecandleboutique.co.uk/product/stargaze-scentsy-diffuser/index-https-mobile.html
20:56:41 30264 /product/stargaze-scentsy-diffuser/ Renamed temp supercache gz file to /home/thecandl/public_html/wp-content/cache/supercache/www.thecandleboutique.co.uk/product/stargaze-scentsy-diffuser/index-https-mobile.html.gz
20:56:41 30264 /product/stargaze-scentsy-diffuser/ Sending buffer to browser
20:56:41 30264 /product/stargaze-scentsy-diffuser/ wp_cache_shutdown_callback: collecting meta data.
20:56:41 30264 /product/stargaze-scentsy-diffuser/ Did not write meta file: meta-wp-cache-0e5b7e0ba295fe062c44df97e2dee2ac.php *1* *1* *1*
20:56:43 30266 /?wc-ajax=get_refreshed_fragments wp_cache_get_cookies_values: return:
20:56:44 30266 /?wc-ajax=get_refreshed_fragments wp_cache_get_cookies_values: return:
20:56:44 30266 /?wc-ajax=get_refreshed_fragments wp_cache_check_mobile: https://www.thecandleboutique.co.uk443
20:56:44 30266 /?wc-ajax=get_refreshed_fragments mobile browser detected: Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1
20:56:44 30266 /?wc-ajax=get_refreshed_fragments In WP Cache Phase 2
20:56:44 30266 /?wc-ajax=get_refreshed_fragments Setting up WordPress actions
20:56:44 30266 /?wc-ajax=get_refreshed_fragments Supercache caching disabled. Only using wp-cache. Non empty GET request. {“wc-ajax”:”get_refreshed_fragments”}
20:56:44 30266 /?wc-ajax=get_refreshed_fragments Created output buffer