Error accessing the organization after upgrading the cluster

Hi all,
I need help if you can, I’ve been trying to upgrade a free tier cluster to a flex paid cluster, every time I make the payment, I can’t access the organization anymore and get this error:
Oops! Something went wrong.

If you’re experiencing a critical issue, please reach out to Chat Support through our Contact Us page.

With a paid plan you are entitled to support. You might get a faster answer if you Chat With Support (bring it up from the Get Help menu):