I am running a dokuwiki site at wiki.microcontrollis.org
It has worked well for a few month, but now something seems to go wrong. The data is still there, but formatting is wrong/missing. I am not aware of making any changes to the setup, so I am trying to debug the issue.
Below are the steps I have taken until now. I don't know how to proceed. I have no experience with PHP. Any suggestion for the next step is very welcome.
I am running the latest stable version of dokuwiki: 2020-07-29 "Hogfather". My server is running Ubuntu 18.04.5 LTS with nginx/1.14.0 and php PHP 7.2.24.
The Firefox developer tools show the following two errors when visiting wiki.microcontrollis.org:
Loading failed for the <script> with source “https://wiki.microcontrollis.org/lib/exe/jquery.php?tseed=34a552433bc33cc9c3bc32527289a0b2”. doku.php:25:1
Loading failed for the <script> with source “https://wiki.microcontrollis.org/lib/exe/js.php?t=dokuwiki&tseed=3962e0d1e73a5bfe80888f0cda38c798”. doku.php:26:1
Clicking https://wiki.microcontrollis.org/lib/exe/jquery.php produces 502 Bad gateway, so I decided to check my server setup. I put a file hello.php with the content below right next to lib/exe/jquery.php on the server and made sure it has exactly the same owner, group and permissions.
<?php
echo'<p>Hello World</p>';
?>
Visiting https://wiki.microcontrollis.org/lib/exe/hello.php works, producing "Hello World", so I think I can conclude that my server setup is correct.
When I copy the contents of jquery.php into hello.php, visiting hello.php yields 502 Bad Gateway. Does this mean there is an issue with the php code? I have no experience with php.