Blank WebUI

Ok, update. I reapplied the access rights from the manual and I still get error 500 when I do http://librenms.<domain/index.php or install.php. But, If I do http://librenms.<domain/calendar.jpg (a picture from ./html/, no problem, I can see it.

[10/Apr/2019:15:21:57 +0200] "GET / HTTP/1.1" 500 - "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0"
[10/Apr/2019:15:22:10 +0200] "GET / HTTP/1.1" 500 - "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0"
[10/Apr/2019:15:22:15 +0200] "GET /install.php HTTP/1.1" 302 - "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0"
[10/Apr/2019:15:22:15 +0200] "GET / HTTP/1.1" 500 - "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0"
[10/Apr/2019:15:22:56 +0200] "GET / HTTP/1.1" 500 - "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0"
[10/Apr/2019:15:26:01 +0200] "GET /login HTTP/1.1" 500 - "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0"
[10/Apr/2019:15:27:47 +0200] "GET /api/v0 HTTP/1.1" 500 - "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0"
[10/Apr/2019:15:27:47 +0200] "GET /favicon.ico HTTP/1.1" 200 15086 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0"
[10/Apr/2019:15:27:59 +0200] "GET /api_v0.php HTTP/1.1" 500 - "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0"
[10/Apr/2019:15:28:18 +0200] "GET /calendar.jpg HTTP/1.1" 200 712 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0"

Does curl show something different now?

Can you show output:

sestatus
a2enmod -l

Still the same output with curl. Seems I’m at a loss with this issue.

httpd -l

Compiled in modules:
  core.c
  mod_so.c
  http_core.c