I’ve been reading through these installation issue posts and have not been able to solve my own problem, even though it sounds the same. I have installed Sitecake in a subdomain because I have a Wordpress site, and I only want to use Sitecake on a couple of pages. I installed the files, made sure permissions on the subdomain dir were set to 775, and I have a test file with Sitecake tags, but no login appears. My PHP version was just updated yesterday to 7.2. I don’t have an error log for Sitecake because it hasn’t even accessed it yet. I tried to check http://weeklyinfo.bellevuerotary.net/sitecake/2.4.10/config/requirements.php, but I get a 500 error on that, too. I don’t know what else to try. My test page is there: http://bellevuerotary.net/weeklyinfo/ I just can’t get the login to come up.
Problem was with file permissions.
My problem was file permissions. Although I thought I had made sure they were all 755 (dir) and 644 (files), apparently they were not. it is working now.