What causes a "Whitelabel Error Page" on a Dashboard?

I think it appears when dashboard is not fully loaded, refreshing the browser solved error for me. 

Hi there! The 'Whitelabel Error Page' with a 404 status that you're seeing typically occurs when the dashboard URL doesn't connect to a valid location in our system. Since it's working for you but not for others, this is most likely related to sharing permissions or browser-related issues.

Here are some troubleshooting steps to try, starting with the simplest solutions:

Browser troubleshooting (try these first):

• Have affected users refresh the page
• Clear browser cache and cookies
• Try opening the dashboard in an incognito/private browsing window
• Test with a different browser (like switching from Safari to Chrome)

If browser steps don't help, check these access settings:

• Verify the dashboard is properly shared with the affected users
• Confirm their user roles include the necessary permissions to view the dashboard
• Double-check user accounts and any directory associations
• Review project ownership settings and transfer correctly if needed
• As a last resort, try re-sharing the dashboard or recreating it

Since refreshing worked for at least one user, there's a good chance this is a browser caching issue that the first set of steps will resolve.

If you've tried all of these steps and users are still experiencing issues, please don't hesitate to reach out to our support team for further investigation!