CloudShell is not working

I receive next error message: Unable to start the environment. To retry, refresh the browser or restart by selecting Actions, Restart AWS CloudShell. System error: Environment was in state: CREATION_FAILED. Expected environment to be in state: RUNNING. To retry, refresh the browser or restart by selecting Actions, Restart AWS CloudShell.

I tried to run it in Chrome, it is my default browser, and Safari - not working

I tried both root and iam account (iam account got administrative rights, and additionally I added for CloudShell) as well that I checked policy simulator (it has no problems) - not working

I restarted and refreshed page and logged out and also changed region - not working

What else I can try?

Thank you