Hi @Zeff -
Thank you for all of these details, it’s very helpful to see the various things you tried along the way.
Reading through - it sounds like switching router mode back to localhost everything is working okay, correct?
Yes, I think there might be an issue with something conflicting with Local (specifically when you’re in the Site domains mode, which allows you to use SSL).
Have you attempted to reboot your machine?
I’m looking at a similar thread about a port conflict with MacOS and this user found success after a reboot:
Sam