If you are receiving the error below, whey you try to install Gopher for Chrome, your Super Admin needs to add the addon to the Marketplace apps allowed list.
- In the Admin console, go to Allowed listed Google Workspace Marketplace apps. Apps > Google Workspace Marketplace apps > Apps list > Google Workspace Marketplace Allowlist.
- Click Add app to allowlist.
- Search the add-on name, Gopher for Chrome, etc.
- For the app to add, click Add to Allowlist.