wpForo: Advanced File Attachments doesn’t work with WordPress 5.9

I use Advanced File Attachments. It’s great and very convenient. However, starting today, I am suddenly unable to attach images. When I drag and drop, nothing happens, and when I open “My Media”, the loading animation is running forever. Advanced File Attachments doesn’t work with WordPress 5.9


The following error is output to the console.

core.min.js?ver=1.13.0:116 Uncaught TypeError: Cannot read properties of undefined (reading '_super')


Until the problem is solved you can replace the core.min.js (v1.13.0)
with the older core.min.js (v1.12.1)
then Advanced File Attachments works again
Or in theme need edit file functions.php and add code:


add_action( 'wp_head', function(){
	wp_deregister_script( 'jquery-ui-core' );
	wp_register_script( 'jquery-ui-core', 'https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js', ['jquery'], '1.12.1' );
}, 0);

UPD: This problem already been fixed in wpForo Advanced Attachments addon v2.1.2 or higher version.

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