# Troubleshooting
Note the lack of a trailing slash in some env vars like FRONTEND_URL. This is important.
Always check the container and browser logs for more specific error messages
Verify your OAuth provider's configuration. See the OAuth documentation
Check if the callback URI you set in your OIDC providers settings is correct. See the callback URI documentation
Check the frontend url in your config file. It should match the URL you use to access MediaManager.
Make sure you are logging in, not signing up.
Try logging in with the following credentials:
Email: admin@mediamanager.local or admin@example.com
Password: admin
Make sure you are using only one volumes for TV, Movies and Downloads. See the configuration in the example docker-compose.yaml file.
If it still doesn't work, please open an Issue. It is possible that a bug is causing the issue.