Joomla 3.10.12, JCE Pro 2.9.52, PHP 7.4.33 (yes, I know ...)
When I try to edit an article or create a new one, the page doesn't stop loading, and finally there is a timeout.
When I change the editor to TinyMCE, CodeMirror, or "None", I can edit articles, and create new ones.
With Error Reporting set to "Maximum" I get this message:
Warning: Cannot declare class \Joomla\CMS\HTML\Helpers\Sidebar, because the name is already in use
in /www/htdocs/po#####ng.blog/2022-12-22/administrator/components/com_jce/includes/classmap.php on line 46
(domain name slightly obfuscated by #####)
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(I already tried to post this, but after I had clicked on "Submit" it wasn't there, and I wasn't sure whether or not it was sent. So it might be duplicated. Sorry for that.)