The error message you received while trying to access Web SSH console from the Azure app service indicates that there was an error while processing your request. You can try the following steps to resolve the issue:
- Is the Web SSH console is enabled for your app service?
- Ensure the SSH endpoint is enabled for your app service.
- Check if the SSH key is configured correctly for your app service.
- Check that the firewall rules are configured correctly for your app service.
Please let us know if you are still having this issue after checking into the above four items. We look forward to your reply.