Hi, in the latest versions of Betheme there is an error Undefined array key "jsclass". This error appears every time I save changes to the page. As I found out, this error is caused by the fact that I added a function to disable Gutenberg in the child theme:
add_filter( 'use_block_editor_for_post', '__return_false' );
Can this be fixed or do I have to replace the feature on all websites with a plugin?