it would appear that Avast Secure Browser solved the issue. That is strange that it did not work on Edge and Firefox.
Thanks for reminding this Avast Browser exists. Problem has been solved.
Hi,
Thank you for the update, good to know that you solved it by using Avast Secure Browser.
The devs mentioned that a possible reason for it not working on Edge and Firefox, could be due to 3rd party cookies being disabled. This means that Google login will not work. As a workaround, closing the dialogue and reopening it should work. However, a user would need to use FB or a password to continue.
They will implement a fix for this.