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If the app spins indefinitely after clicking Save when adding a domain to the allow or block list, follow these steps to troubleshoot the issue:

Use an incognito or private browsing window

1. Open the dashboard in an incognito/private window
2. Retry adding the domain. Browser extensions or system settings may block expected page actions

Check for network errors

1. Reproduce the issue while recording a HAR (HTTP Archive) file
2. Look for a net::ERR_HTTP2_PROTOCOL_ERROR in the logs; this often points to bad cache or interfering extensions
3. Clear the browser cache and disable active extensions
4. Retry the action

If the issue persists, capture a fresh HAR file and send it to the support team for further review.