Hey guys was chatting with Gizmo on this and he asked to share it on the forums..
I just did a completely fresh installation of 7.7.4 and it was pretty much un-eventful. I have one wierd issue. I go to change the forum style from dark to light in the bottom dropdown and vice versa. It gives a 404 error because it has doubled the entry when referencing it'self.
I ran the test script it says nothing is broken. It's only that dropdown having the issue. I tried making baseurl the same as fullURL as it is the same.
Any thoughts ? It's the only thing that seems to be off. everything else is awesome. I used to install this in my sleep in the old days this might be something to check.
I cannot reproduce your issue on a fresh/clean install of current versions of everything. Have you tried removing your customized server redirects, or restoring your server settings to their defaults? Have you tried updating your versions? It could be possible that any issue you are experiencing now, has been resolved in a newer (currently supported) version.
The following is what I tested with. Zero issues presented themselves. Everything continues to work as expected. No code changes or redirection tricks used or needed.
FRESH INSTALL OF: Windows 10 Pro version 1909 Internet Information Services 10.0 (IIS/10) PHP 7.4.11 MySQL 5.7.31 UBB.threads 7.7.4 (installed to ROOT of localhost)
I noticed a few things about your issue that stand out as unnatural:
You're running the bleeding edge version of PHP, so new that it wasnt even officially released at the time you were running it, but are doing it on web server version that has reached end of support several years ago (2018).
Either of these could be related to the cause of your problem. Though, i believe your main issue is the custom url redirects you've created.