Applies to: 20.1 (possibly others)
When going to the User Portal before it reaches the authentication login the page gets stuck showing Loading.... but never returns.
This can happen on any browser.
This looks to be an issue with the language packs loaded into the browser that are being used to render the page, so it may work with some browsers but not others due to their language packs being different.
The issue seems to occur when using a non English native locale and you have 'English en' and 'English en-US' setup in the browsers languages. Eg:
Remove one of the English languages and the page loads correctly.