This sounds like it's either a problem with something on your computer, or your internet connection.
Can you try the following:
Miraheze already exists and is a phenomenal MediaWiki-based alternative to Fandom that's free and open-source and actually acts as a proper wiki hosting service. Miraheze is also immune to all the shitty changes that Fandom constantly forces upon its users without their consent.
There's no private wiki functionality on wikia/fandom.
Author Brandon Sanderson's team uses WikidPad to organise an internal wiki. You can see an example of this in action on his livestream timestamp 1hr 12m 45s https://youtu.be/lKmGmPsIjNQ
I've used Dropbox paper for this for rpgs amongst friends and it's worked well
Have the same issue. Chrome shows me the background, Edge (no mods) says the page is unreachable.
Edit: So finally got tired of waiting for someone to actually fix the issue so setup FoxyProxy + a random free proxy just for wikia URL and can now access the site again.