mylittlepangreas

Never mind, this broke the links for the comics, do the function for checking for array is working nice

I was able to fix this issue by commenting on a section of a function on the general.php under lib\collection\settings\general.php.

function general() {
	add_filter( 'admin_init', __NAMESPACE__ . '\hook_add_section_general' );
	add_filter( 'admin_init', __NAMESPACE__ . '\hook_add_field_name' );
	add_filter( 'admin_init', __NAMESPACE__ . '\hook_add_field_slug' );
	add_filter( 'admin_init', __NAMESPACE__ . '\hook_add_field_permalink' );
	add_filter( 'admin_init', __NAMESPACE__ . '\hook_add_field_description' );
	add_filter( 'admin_init', __NAMESPACE__ . '\hook_add_field_media' );
	add_filter( 'admin_init', __NAMESPACE__ . '\hook_add_field_archive' );
	add_filter( 'admin_init', __NAMESPACE__ . '\hook_add_field_syndicate' );
	add_filter( 'admin_init', __NAMESPACE__ . '\hook_add_field_supports' );
	add_filter( 'admin_head', __NAMESPACE__ . '\hook_add_help_general' );
	add_filter( 'current_screen', __NAMESPACE__ . '\hook_enqueue_media_manager' );
	add_filter( 'delete_attachment', __NAMESPACE__ . '\hook_delete_collection_media' );
/**	add_filter( 'display_media_states', __NAMESPACE__ . '\hook_add_collection_media_state' );  */

And adding an array verification if statement into the next function inside de media.php on \lib\collection\media.php

function hook_add_post_media_states( array $states ) : array {
	$comics = get_post_meta( get_the_ID(), 'webcomic_post' );
		if (is_array($comics) || is_object($comics))
		{
		foreach ( $comics as $comic ) {
			$collection = get_post_type( $comic );

			if ( isset( $states[ $collection ] ) ) {
				continue;
			} elseif ( ! webcomic_collection_exists( $collection ) ) {
				delete_post_meta( get_the_ID(), 'webcomic_post', $comic );

				continue;
			}

			// Translators: Post type name.
			$states[ $collection ] = sprintf( __( '%s Comic Image', 'webcomic' ), webcomic( "option.{$collection}.name" ) );
			}
		}
	return $states;
}

Now I’m sure the function modification will not break anything but I’m not sure what will happen with commenting on the argument on the first general.php part.

This is the PHP error I get when I change the background image and causes the customizer to break.

[22-Jun-2021 18:48:02 UTC] PHP Warning:  Invalid argument supplied for foreach() in C:\wamp64\www\wordpress\wp-content\plugins\webcomic\lib\collection\media.php on line 190
[22-Jun-2021 18:48:02 UTC] PHP Stack trace:
[22-Jun-2021 18:48:02 UTC] PHP   1. {main}() C:\wamp64\www\wordpress\wp-admin\customize.php:0
[22-Jun-2021 18:48:02 UTC] PHP   2. do_action() C:\wamp64\www\wordpress\wp-admin\customize.php:281
[22-Jun-2021 18:48:02 UTC] PHP   3. WP_Hook->do_action() C:\wamp64\www\wordpress\wp-includes\plugin.php:484
[22-Jun-2021 18:48:02 UTC] PHP   4. WP_Hook->apply_filters() C:\wamp64\www\wordpress\wp-includes\class-wp-hook.php:316
[22-Jun-2021 18:48:02 UTC] PHP   5. WP_Customize_Manager->customize_pane_settings() C:\wamp64\www\wordpress\wp-includes\class-wp-hook.php:292
[22-Jun-2021 18:48:02 UTC] PHP   6. WP_Customize_Background_Image_Control->json() C:\wamp64\www\wordpress\wp-includes\class-wp-customize-manager.php:4969
[22-Jun-2021 18:48:02 UTC] PHP   7. WP_Customize_Background_Image_Control->to_json() C:\wamp64\www\wordpress\wp-includes\class-wp-customize-control.php:336
[22-Jun-2021 18:48:02 UTC] PHP   8. wp_prepare_attachment_for_js() C:\wamp64\www\wordpress\wp-includes\customize\class-wp-customize-upload-control.php:61
[22-Jun-2021 18:48:02 UTC] PHP   9. get_media_states() C:\wamp64\www\wordpress\wp-includes\media.php:4126
[22-Jun-2021 18:48:02 UTC] PHP  10. apply_filters() C:\wamp64\www\wordpress\wp-admin\includes\template.php:2348
[22-Jun-2021 18:48:02 UTC] PHP  11. WP_Hook->apply_filters() C:\wamp64\www\wordpress\wp-includes\plugin.php:212
[22-Jun-2021 18:48:02 UTC] PHP  12. Mgsisk\Webcomic\Collection\hook_add_post_media_states() C:\wamp64\www\wordpress\wp-includes\class-wp-hook.php:294
[22-Jun-2021 18:48:02 UTC] PHP Warning:  array_unique() expects parameter 1 to be array, bool given in C:\wamp64\www\wordpress\wp-content\plugins\webcomic\lib\collection\settings\general.php on line 329
[22-Jun-2021 18:48:02 UTC] PHP Stack trace:
[22-Jun-2021 18:48:02 UTC] PHP   1. {main}() C:\wamp64\www\wordpress\wp-admin\customize.php:0
[22-Jun-2021 18:48:02 UTC] PHP   2. do_action() C:\wamp64\www\wordpress\wp-admin\customize.php:281
[22-Jun-2021 18:48:02 UTC] PHP   3. WP_Hook->do_action() C:\wamp64\www\wordpress\wp-includes\plugin.php:484
[22-Jun-2021 18:48:02 UTC] PHP   4. WP_Hook->apply_filters() C:\wamp64\www\wordpress\wp-includes\class-wp-hook.php:316
[22-Jun-2021 18:48:02 UTC] PHP   5. WP_Customize_Manager->customize_pane_settings() C:\wamp64\www\wordpress\wp-includes\class-wp-hook.php:292
[22-Jun-2021 18:48:02 UTC] PHP   6. WP_Customize_Background_Image_Control->json() C:\wamp64\www\wordpress\wp-includes\class-wp-customize-manager.php:4969
[22-Jun-2021 18:48:02 UTC] PHP   7. WP_Customize_Background_Image_Control->to_json() C:\wamp64\www\wordpress\wp-includes\class-wp-customize-control.php:336
[22-Jun-2021 18:48:02 UTC] PHP   8. wp_prepare_attachment_for_js() C:\wamp64\www\wordpress\wp-includes\customize\class-wp-customize-upload-control.php:61
[22-Jun-2021 18:48:02 UTC] PHP   9. get_media_states() C:\wamp64\www\wordpress\wp-includes\media.php:4126
[22-Jun-2021 18:48:02 UTC] PHP  10. apply_filters() C:\wamp64\www\wordpress\wp-admin\includes\template.php:2348
[22-Jun-2021 18:48:02 UTC] PHP  11. WP_Hook->apply_filters() C:\wamp64\www\wordpress\wp-includes\plugin.php:212
[22-Jun-2021 18:48:02 UTC] PHP  12. Mgsisk\Webcomic\Collection\Settings\hook_add_collection_media_state() C:\wamp64\www\wordpress\wp-includes\class-wp-hook.php:294
[22-Jun-2021 18:48:02 UTC] PHP  13. array_unique() C:\wamp64\www\wordpress\wp-content\plugins\webcomic\lib\collection\settings\general.php:329

I was having the same error, what I found was that when I add a background image on my theme (ePorfolio) the customizer would break if the webcomics plugin enabled. my image is a png so maybe the file format is the issue but not sure.