Run vsce publish 1 Run vsce publish: After providing the PAT, run the vsce publish command again. The error should no longer appear. 2 Security Best Practices Secure Storage: Store your PAT securely. Avoid submitting it to version control or sharing it publicly. Limited Scopes: Grant only the necessary scopes to your PAT (in this case, "Marketplace (Publish)"). 3 Expiration: Set an appropriate expiration date for your PAT. Environment Variables: Using environment variables is the most secure way to provide your PAT to vsce.