I also tried connecting over http, but it gives me a "too many redirects" error.
It's constantly forwarding to: http://mywebsite.com/admin215rt34t34rt3ecmqf3w/index.php/security/compromised?uri=http%3A%2F%2Fmywebsite.com%2Fadmin215rt34t34rt3ecmqf3%2Findex.php%2Fsecurity%2Fcompromised%3F&_token=0Y4tVCoqvbgjhG9h2yxT0lMyzDdk
(I changed the domain, token and admin folder name for my security)
Should it be forwarding to security/compromised? That's an odd name for a web folder.
Some more details Ill add, it looks like it's always a 302 redirect.
I tried setting PS_COOKIE_SAMESITE to lax, no luck.
I increased the php memory limit to 512MB, no luck.