CPTUI Causes critical error messages: PHP Warning: Invalid argument supplied

Hello first of all thanks for the awesome Plugin:)

I have a Problem with my CPT UI installation. i Honestly dont know what happend, but i think the error accoured when i created a new post type a while ago. I tried to fix it the last 4 days but with no luck

I Recieve the following error message from my Logs:

/public_html/wp-content/plugins/custom-post-type-ui/custom-post-type-ui.php on line 611PHP message: PHP Warning: Invalid argument supplied for foreach()

im not very familiar with coding but i looked up the costum-post-type-ui.php file and on the line 611 following code is shown (with the few following lines):

	foreach ( $taxonomy['labels'] as $key => $label ) {

		if ( ! empty( $label ) ) {
			$labels[ $key ] = $label;
		} elseif ( empty( $label ) && in_array( $key, $preserved, true ) ) {
			$singular_or_plural = ( in_array( $key, array_keys( $preserved_labels['taxonomies']['plural'] ) ) ) ? 'plural' : 'singular';
			$label_plurality    = ( 'plural' === $singular_or_plural ) ? $taxonomy['label'] : $taxonomy['singular_label'];
			$labels[ $key ]     = sprintf( $preserved_labels['taxonomies'][ $singular_or_plural ][ $key ], $label_plurality );
		}

The following Line is also mentioned in the error log:
/public_html/wp-content/plugins/custom-post-type-ui/custom-post-type-ui.php on line 381PHP message: PHP Warning: Invalid argument supplied for foreach()

Wich calls another thing:

	foreach ( $post_type['labels'] as $key => $label ) {

		if ( ! empty( $label ) ) {
			if ( 'parent' === $key ) {
				$labels['parent_item_colon'] = $label;
			} else {
				$labels[ $key ] = $label;
			}
		} elseif ( empty( $label ) && in_array( $key, $preserved, true ) ) {
			$singular_or_plural = ( in_array( $key, array_keys( $preserved_labels['post_types']['plural'] ) ) ) ? 'plural' : 'singular';
			$label_plurality    = ( 'plural' === $singular_or_plural ) ? $post_type['label'] : $post_type['singular_label'];
			$labels[ $key ]     = sprintf( $preserved_labels['post_types'][ $singular_or_plural ][ $key ], $label_plurality );
		}

it seems like something went wrong with a argument “foreach” but i dont know what caused it… there was nothing changed with other post types and i am not really sure what caused it. i did not do any updates recently.
i have searched this forum trought and tried some things wich where similar i have tried the following things in the following order:

-Deactivating all other plugins (It seems CPTUI is causing it)

-Deactivating and reactivating CPTUI (Still no change)

-Updated the settings for permalinks (Did not work tried multiple times)

-imported the post type code blob ( Was suggested in another post in this forum)

-Deleted the new created post types (After that didnt work i restored to a backup i did before deleting the new post types)

-Reinstalled CPTUI

Here is a code blob from the cptui settings:
{"dj_portfolios":{"name":"dj_portfolios","label":"Dj Portfolios","singular_label":"Dj Portfolio","description":"","public":"true","publicly_queryable":"true","show_ui":"true","show_in_nav_menus":"true","delete_with_user":"false","show_in_rest":"true","rest_base":"","rest_controller_class":"","has_archive":"true","has_archive_string":"","exclude_from_search":"false","capability_type":"post","hierarchical":"true","rewrite":"true","rewrite_slug":"","rewrite_withfront":"true","query_var":"true","query_var_slug":"","menu_position":"","show_in_menu":"true","show_in_menu_string":"","menu_icon":"","supports":["title","editor","thumbnail","excerpt","trackbacks","custom-fields","comments","revisions","author","page-attributes","post-formats"],"taxonomies":["artist_type"],"labels":{"menu_name":"Dj Portfolios","all_items":"All Dj Portfolios","add_new":"Add new","add_new_item":"Add new Dj Portfolio","edit_item":"Edit Dj Portfolio","new_item":"New Dj Portfolio","view_item":"View Dj Portfolio","view_items":"View Dj Portfolios","search_items":"Search Dj Portfolios","not_found":"No Dj Portfolios found","not_found_in_trash":"No Dj Portfolios found in trash","parent":"Parent Dj Portfolio:","featured_image":"Featured image for this Dj Portfolio","set_featured_image":"Set featured image for this Dj Portfolio","remove_featured_image":"Remove featured image for this Dj Portfolio","use_featured_image":"Use as featured image for this Dj Portfolio","archives":"Dj Portfolio archives","insert_into_item":"Insert into Dj Portfolio","uploaded_to_this_item":"Upload to this Dj Portfolio","filter_items_list":"Filter Dj Portfolios list","items_list_navigation":"Dj Portfolios list navigation","items_list":"Dj Portfolios list","attributes":"Dj Portfolios attributes","name_admin_bar":"Dj Portfolio","item_published":"Dj Portfolio published","item_published_privately":"Dj Portfolio published privately.","item_reverted_to_draft":"Dj Portfolio reverted to draft.","item_scheduled":"Dj 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i hope you can help me out i tired to fix this for the last seven days:(

Kind regards
Liam

The page I need help with: [log in to see the link]