That is the problem when two people have the "same problem": Rudraksh, the vice-OP, runs Nginx, whereas Ken the OP runs Apache.
Visvanath Ratnaweera
Visvanath Ratnaweera hozzászólásai
May nosuchshim.php would have been a better name.

I know, they don't apply directly - it is an upgrade to 5.1. But I repeated the analogues thing to upgrade to 5.2 and also to install 5.2 anew. All worked. As I said earlier, I can't give any instructions to match your environment, which is unknown to me - Ubuntu Linux, Yes, it is a derivative of Debian, but not the Aapanel thing. I hope, others would help.
Yeah, Moodle Workplace didn't come to my mind. It is logical that both, the Moodle Open Source software and its closed source variation, have all three things: the software run by the users/customers, sites managed by Moodle Partners and the "Clouds" - the SaaS. The users/customers are divided in to those three. From what I heard of Canvas, their customers are mostly on their SaaS. So a breach in the SaaS does more damage to Canvas.
Moodle in English -> Moodle community sites -> Can't reply on moodle.org
Visvanath Ratnaweera írta időpontban
I'm experiencing this on-and-off for months as has been reported many times in this forum.
Right now I had a repetition. I couldn't post this reply:

The CloudFlare button was not there at the beginning. Then with the box to tick. Then the ticked box. How many times I try, I falls back to the above screen.
Then opened a second tab in the same browser, started a new reply, copy and pasted the hanging reply in the other tab. Then the site accepted the reply as you can see here https://moodle.org/mod/forum/discuss.php?d=473950#p1899511.
Edit: Only later I saw that the hyperlinks to "video" and "script" got lost during copy-and-paste. Had just enough time to update the post.