Testing sites indicate error on home page but forum seems to redirect fine

[PrimalPrime]

The site seems to load fine at https://chatfreespeech.com and after redirecting to https://chatfreespeech.com/forum/ however https://pagespeed.web.dev says there is a 500 error as does https://gtmetrix.com and https://rankmath.com/. I tried repair_settings.php. No luck. Tried changing board url in settings.php to  https://chatfreespeech.com/forum/. No luck.

https://prnt.sc/aAm4Wz0iC2Uk
https://prnt.sc/SzYa6ZRHzNCq
https://prnt.sc/re2i0yu5WEPD

Any ideas? Thanks

[Doug Heffernan]

The 500 error is almost always server related. Are there any errors logged in at the Server Error log page?

[PrimalPrime]

The host is unable to find anything. I think it is related to me changing the chatroom names. At one time, the site defaulted to the main chatroom, which no longer is the main chatroom nor even exists. A job for my new developer, I think.