Cannot log in to

I cannot log in to I know I have a valid account. I even receive an email notification like:

Your org, xxxxxxx, has exceeded your monthly credit usage limit.

When I try to log in to, a blank black screen appears and that’s it.

Any help?

Hey there. Could you private message me or email I’ll need to ask a few questions to help you troubleshoot this that may be confidential

Thanks! I will email to