How can we fix the issue with Content Builder that keeps loading and won’t open, even after refreshing the browser? All other features are working fine except Content Builder.

Hi @automation Automation

Can you try to clear the cache and cookies? 

If you're in incognito mode, allow the use of third-party cookies. 

If you still encounter the issue I would recommend following this guide: 

You can also change browser to narrow down the issue. 

If even after trying all of this you continue to encounter an issue, I would recommend to: 

Open Developer Tools (F12) while Content Builder is loading 

Check the Network tab for failed requests 

Look for 403, 500, or other error codes 

Check the Console tab for JavaScript errors