Stuck on initializing
You can try connecting to another server if you can't connect to our main EU server.
Then selecting a different server:
This is a state you should never be stuck in, unless a third-party extension is either blocking, changing or injecting code that causes conflict with our code.
Let's first figure out if browser extensions are causing this issue. Try disabling your extensions (those that have "site access" permission) one by one and see if this helps. If you do find the extension that causes this issue, you should report this bug to this extensions' developer.
If all fails
You can try the following solutions