Error occured with checking server setup

I am following this guide, installing NC17 on REHL 8. I am getting “Error occurred while checking server setup” when I try to check my server from the Settings page.

I have ensured that all the web directories are owned by nginx:nginx and feel confident in the setup, but I would like to run this checker to verify it is all secured.

I was tailing my /var/log/nginx/nextcloud.error log and I have not gotten any information from that, as it is empty. I mostly want to ensure that OCCache and redis are working properly. Any ideas on why I wouldn’t be able to access that section int he admin settings?