User Issue:

When importing a dashboard, if the import fails the error message is very un-informative as it just displays the following 

We couldn't import your dashboard

Try again in a few minutes, or check our status page for reported incidents.

Check status page

Proposed solution:

When the dashboard fails to import, have a more detailed info (either in the logs or on the toast pop-up) on why it failed so users are aware of the issue and is able to action it accordingly.