AWS cloudshell fails to start！Unable to start the environment. To retry, refresh the browser or restart by selecting Actions, Restart AWS CloudShell.

I refer to the methods in the community to do it. I have tried browsers such as google and Firefox, but it doesn't work. There are also regions. I am from the Ohio region and I also have the cloud permission, but it just doesn't work. I've been trying for days and I'm so confused because of this, hope someone can help me