Product Filter by WBW breaks Sydney theme in dashboard

Hello,

I have installed Product Filter by WBW (free version). After the installation and activation I went to Sedney theme to do some modifications. I received an error message that there is a critical error on this site. After disabling the WBW plugin, the issue was gone.

I have this issue on two different servers with two different sites.

From the error log:

[Wed Sep 04 07:52:13.980629 2024] [lsapi:error] [pid 40524:tid 140212864628480] [client 2a02:a468:58e:1:117b:497e:2f4e:79ad:62434] [host www.some-website.com] Backend fatal error: PHP Fatal error: Uncaught Error: Attempt to assign property "priority" on null in /home/someuserid/domains/some-website.com/public_html/wp-content/themes/sydney/inc/customizer/options/woocommerce.php:22\nStack trace:\n#0 /home/someuserid/domains/some-website.com/public_html/wp-content/themes/sydney/inc/customizer/customizer.php(113): require()\n#1 /home/someuserid/domains/some-website.com/public_html/wp-includes/class-wp-hook.php(324): sydney_customize_register()\n#2 /home/someuserid/domains/some-website.com/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()\n#3 /home/someuserid/domains/some-website.com/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()\n#4 /home/someuserid/domains/some-website.com/public_html/wp-includes/class-wp-customize-manager.php(947): do_action()\n#5 /home/someuserid/domains/some-website.com/public_html/wp-includes/class-wp-hook.php(324): WP_Customize_Manager->wp_loaded()\n#6 /home/someuserid/domains/some-website.com/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()\n#7 /home/someuserid/domains/some-website.com/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()\n#8 /home/someuserid/domains/some-website.com/public_html/wp-settings.php(722): do_action()\n#9 /home/someuserid/domains/some-website.com/public_html/wp-config.php(102): require_once('/home/someuserid…')\n#10 /home/someuserid/domains/some-website.com/public_html/wp-load.php(50): require_once('/home/someuserid…')\n#11 /home/someuserid/domains/some-website.com/public_html/wp-blog-header.php(13): require_once('/home/someuserid…')\n#12 /home/someuserid/domains/some-website.com/public_html/index.php(17): require('/home/someuserid…')\n#13 {main}\n thrown in /home/someuserid/domains/some-website.com/public_html/wp-content/themes/sydney/inc/customizer/options/woocommerce.php on line 22\n, referer: https://www.some-website.com/wp-admin/customize.php?return=%2Fwp-admin%2F

What can I do to solve this issue?

With kind regards,

Willem-Jan Vroom