I click on the Google button. A new tab opens detailing what account details imgur can see. Once I confirm the new tab closes but nothing else happens.
Have you assigned google.com to a Container? Are you opening imgur from that Container?
Please provide more specific steps to reproduce.
Google is assigned to my personal container. I try to open imgur from the same container.
@SoftVision-EmilPasca - can you help us reproduce this? I was unable to reproduce it.
Is there anything else I can do to provide diagnostics? At this point I can't login to anything that uses Google OAuth.
I have managed to reproduce the issue using the following STR:
[Prerequisites]:
[Steps to reproduce]:
[Actual result]:
However, after following the STR if you refresh the page, you are automatically redirected to the Imgur homepage and you are correctly logged.
@ruipacheco can you please look over the STR and confirm if this is the issue that are you encountering on? Also, what happens in your case if you refresh the page after you try to log in?
[Notes]:

This thing is totaly broken on my side. Can't use it anymore...
Can't use it to create an account on https://www.indiehackers.com/
I got the same problem on imgur.com, but I am not using multi-account-containers.
Same procedure as in Marius Comans' screen recording, except, that I don't get a prompt to allow anything and I'm not logged in, after reloading the page.
(deleted my comment, as it turned out to be caused by Privacy Badger, not Multi Account Containers, apologies for the spam)
Most helpful comment
I got the same problem on imgur.com, but I am not using multi-account-containers.
Same procedure as in Marius Comans' screen recording, except, that I don't get a prompt to allow anything and I'm not logged in, after reloading the page.