Just in the process of removing this problematic plugin from all the sites I run. The update a week ago has broken all WP backend editing. With no further update in sight, it’s time to get rid!

[29-Mar-2023 13:57:26 UTC] PHP Fatal error: Uncaught Error: Call to undefined function array1() in /…../wp-content/plugins/remove-problematic-formatting-options-from-tinymce/pixelovely_removetinymcebuttons.php:31
Stack trace:

0 ,,,,,/wp-includes/class-wp-hook.php(310): pixelovely_extended_editor_mce_buttons(Array)

1 …../wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array)

2 ……/wp-content/plugins/advanced-custom-fields-pro/includes/fields/class-acf-field-wysiwyg.php(115): apply_filters(‘mce_buttons’, Array, ‘acf_content’)

3 …../wp-content/plugins/advanced-custom-fields-pro/includes/fields/class-acf-field-wysiwyg.php(152): acf_field_wysiwyg->get_toolbars()

4 ……./wp-includes/class-wp-hook.php(308): acf_field_wysiwyg->acf_enqueue_uploader(”)

5 ……/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(”, Array)

6 ……/public_html/wp-content/plugins/remove-problematic-formatting-options-from-tinymce/pixelovely_removetinymcebuttons.php on line 31