Hi,
same problem on 8.1.2. Cache solution was not working for me 😞
I took a look in the browser console . I got this Error 406 on POST xhr
error.log on Apache Server shows this:
[Fri Nov 03 08:07:07.229400 2023] [:error] [pid 482930:tid 140311305103104] [client ***.***.***.***:0] [client ***.***.***.***] ModSecurity: Access denied with code 406 (phase 2). Pattern match "=(?:ogg|tls|ssl|gopher|file|data|php|zlib|zip|glob|s3|phar|rar|s(?:sh2?|cp)|
Solution: Disable mod_security (firewall) on Server. Update the modules --> all OK. Enable mod_security again 😉
regards, Roland