Nearata I got same problem,I tried in my testing forum. When I enabled your plugin,I also got 500 Error on forum home page.So I try to enable debug mode and enable errors display settings in php.ini,but I got nothing.When I try to access my forum home page by using aria2c,I got some message:
< HTTP/2 200
< date: Thu, 30 Jul 2020 05:18:37 GMT
< server: Apache
< cache-control: max-age=0
< expires: Thu, 30 Jul 2020 05:18:37 GMT
< vary: Accept-Encoding
< content-type: text/html; charset=UTF-8
<
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 1052672 bytes) in /[PATH TO FLARUM]/vendor/axy/sourcemap/parsing/Line.php on line 63
