I added an external domain to Salesforce. The process went without any problem and I also managed to add a few paths to the domain which pointed to Force sites, in the same day. After a few days, I wanted to add more paths but I kept getting the following error: Error: The selected site is not supported by the selected domain. I have tried many things such as changing the API version, creating a page with only a single HTML element, doing various combinations but none of them worked. I also googled my problem and found two links which did not help me fix my problem. Below are those two links:
https://trailhead.salesforce.com/trailblazer-community/feed/0D54S00000A98fqSAB
https://developer.salesforce.com/forums/?id=9062I000000IVBEQA4

So please do not refer me to those links, I've already tried the solutions which were shown in the links. My site does not have a login system.

I am getting quite frustrated from this error because I do not know where it came from. Please help me if you can, thank you!