Fatal error: Uncaught Error: Call to a member function get() on null in /home/co

Fatal error: Uncaught Error: Call to a member function get() on null in /home/comfortz/comfortzone.se/wp-content/plugins/swedbank-pay-checkout/includes/class-wc-swedbank-pay-payment-url.php:66 Stack trace: #0 /home/comfortz/comfortzone.se/wp-includes/shortcodes.php(355): SwedbankPay\Checkout\WooCommerce\WC_Swedbank_Pay_Payment_Url->shortcode_woocommerce_checkout() #1 [internal function]: do_shortcode_tag() #2 /home/comfortz/comfortzone.se/wp-includes/shortcodes.php(227): preg_replace_callback() #3 /home/comfortz/comfortzone.se/wp-includes/class-wp-hook.php(308): do_shortcode() #4 /home/comfortz/comfortzone.se/wp-includes/plugin.php(205): WP_Hook->apply_filters() #5 /home/comfortz/comfortzone.se/wp-content/plugins/advanced-custom-fields-pro/includes/fields/class-acf-field-wysiwyg.php(426): apply_filters() #6 /home/comfortz/comfortzone.se/wp-includes/class-wp-hook.php(308): acf_field_wysiwyg->format_value() #7 /home/comfortz/comfortzone.se/wp-includes/plugin.php(256): WP_Hook->apply_filters() #8 /home/comfortz/comfortzone.se/wp-content/plugins/advanced-custom-fields-pro/includes/acf-hook-functions.php(109): apply_filters_ref_array() #9 /home/comfortz/comfortzone.se/wp-includes/class-wp-hook.php(308): _acf_apply_hook_variations() #10 /home/comfortz/comfortzone.se/wp-includes/plugin.php(205): WP_Hook->apply_filters() #11 /home/comfortz/comfortzone.se/wp-content/plugins/advanced-custom-fields-pro/includes/acf-value-functions.php(172): apply_filters() #12 /home/comfortz/comfortzone.se/wp-content/plugins/advanced-custom-fields-pro/includes/fields/class-acf-field-group.php(147): acf_format_value() #13 /home/comfortz/comfortzone.se/wp-includes/class-wp-hook.php(308): acf_field__group->format_value() #14 /home/comfortz/comfortzone.se/wp-includes/plugin.php(256): WP_Hook->apply_filters() #15 /home/comfortz/comfortzone.se/wp-content/plugins/advanced-custom-fields-pro/includes/acf-hook-functions.php(109): apply_filters_ref_array() #16 /home/comfortz/comfortzone.se/wp-includes/class-wp-hook.php(308): _acf_apply_hook_variations() #17 /home/comfortz/comfortzone.se/wp-includes/plugin.php(205): WP_Hook->apply_filters() #18 /home/comfortz/comfortzone.se/wp-content/plugins/advanced-custom-fields-pro/includes/acf-value-functions.php(172): apply_filters() #19 /home/comfortz/comfortzone.se/wp-content/plugins/advanced-custom-fields-pro/pro/fields/class-acf-field-flexible-content.php(880): acf_format_value() #20 /home/comfortz/comfortzone.se/wp-includes/class-wp-hook.php(308): acf_field_flexible_content->format_value() #21 /home/comfortz/comfortzone.se/wp-includes/plugin.php(256): WP_Hook->apply_filters() #22 /home/comfortz/comfortzone.se/wp-content/plugins/advanced-custom-fields-pro/includes/acf-hook-functions.php(109): apply_filters_ref_array() #23 /home/comfortz/comfortzone.se/wp-includes/class-wp-hook.php(308): _acf_apply_hook_variations() #24 /home/comfortz/comfortzone.se/wp-includes/plugin.php(205): WP_Hook->apply_filters() #25 /home/comfortz/comfortzone.se/wp-content/plugins/advanced-custom-fields-pro/includes/acf-value-functions.php(172): apply_filters() #26 /home/comfortz/comfortzone.se/wp-content/plugins/advanced-custom-fields-pro/includes/api/api-template.php(312): acf_format_value() #27 /home/comfortz/comfortzone.se/wp-content/plugins/polylang-pro/integrations/acf/acf-sync-metas.php(230): get_field_objects() #28 /home/comfortz/comfortzone.se/wp-content/plugins/polylang-pro/integrations/acf/acf-sync-metas.php(261): PLL_ACF_Sync_Metas->get_translation_options() #29 /home/comfortz/comfortzone.se/wp-includes/class-wp-hook.php(310): PLL_ACF_Sync_Metas->copy_metas() #30 /home/comfortz/comfortzone.se/wp-includes/plugin.php(205): WP_Hook->apply_filters() #31 /home/comfortz/comfortzone.se/wp-content/plugins/polylang-pro/vendor/wpsyntex/polylang/modules/sync/sync-post-metas.php(78): apply_filters() #32 /home/comfortz/comfortzone.se/wp-content/plugins/polylang-pro/vendor/wpsyntex/polylang/modules/sync/sync-metas.php(271): PLL_Sync_Post_Metas->get_metas_to_copy() #33 /home/comfortz/comfortzone.se/wp-includes/class-wp-hook.php(308): PLL_Sync_Metas->update_meta() #34 /home/comfortz/comfortzone.se/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters() #35 /home/comfortz/comfortzone.se/wp-includes/plugin.php(517): WP_Hook->do_action() #36 /home/comfortz/comfortzone.se/wp-includes/meta.php(288): do_action() #37 /home/comfortz/comfortzone.se/wp-includes/post.php(2522): update_metadata() #38 /home/comfortz/comfortzone.se/wp-admin/includes/post.php(1699): update_post_meta() #39 /home/comfortz/comfortzone.se/wp-admin/post.php(192): wp_set_post_lock() #40 {main} thrown in?/home/comfortz/comfortzone.se/wp-content/plugins/swedbank-pay-checkout/includes/class-wc-swedbank-pay-payment-url.php?on line?66

Get this error when I try to edit a checkout page with the swedbank plugin