I have an arcade statement, which was working fine. However, the query function on the rest end points broke, which of course caused issues with my arcade statement.
I opened the arcade and was getting "Test execution error: Unknown Error. Verify test data." when I did a test run.
I attempted to catch the error with IsEmpty, that did not seem to work. Trying to think of the best way to handle a broken rest service and return something to the user. Which of course is hard to test, as I can't plan for when a rest endpoint might break.

Looking at the FEMA Rest Service

I know it would be best to fix the rest service, but it's not my organization. So, I am looking for a way in arcade to catch any errors and display a default message "High demand on layer, results unavailable."