Invalid client provided Message when Signin in to AWS APP Studio

When you encounter the "Invalid client provided" message while trying to sign in to AWS App Studio, this could be related to authentication issues with IAM Identity Center (formerly AWS Single Sign-On). Here are some troubleshooting steps you can try:

1. Check if your SSO token cache might be corrupted. This is a common issue that can cause authentication errors. You can try deleting the ~/.aws/sso directory on your local machine and then attempt to authenticate again.

2. Ensure you're using the correct sign-in URL. If you're using IAM Identity Center, you need to use the specific URL provided to you (typically in the format of https://your_subdomain.awsapps.com/start) rather than trying to sign in with your AWS account ID.

3. Clear your browser cache and cookies, or try using a private/incognito browsing window, as stored data can sometimes interfere with the authentication process.

4. Verify that your device's date and time settings are correct and synchronized. AWS authentication is sensitive to time discrepancies.

5. If you're still experiencing issues, contact your system administrator as you may need an updated configuration or there might be permission issues with your account.

These steps should help resolve the "Invalid client provided" error when signing in to AWS App Studio.
Sources
Community | Setting up Amazon Q in VSCode using IAM Identity Center
Organization user can only login with provided link? | AWS re:Post
signin.aws.amazon.com | AWS re:Post
Cant sign in with new AWS sign method | AWS re:Post