Has anyone had trouble verifying/submitting code to the google foobar challenges? I have been stuck unable to progress in the challenges, not because they are difficult but because I literally cannot send anything. 
After I type "verify solution.py" it responds "Verifying solution..." then after a delay: "There was a problem evaluating your code."
I had the same problem with challenge 1. I waited an hour then tried verifying again and it worked. Challenge 2 I had no problems. But now with challenge 3 I am back to the same cryptic error. 
To ensure it wasn't my code, I ran the challenge with no code other than "return 3" which should be the correct response to test 1. So I would have expected to see a "pass" for test 1 and then "fail" for all the rest of the tests. However it still said "There was a problem evaluating your code."
I tried deleting cookies and running in a different browser. Neither changed anything. I waited overnight, still nothing. I am slowly running out of time to complete the challenge. Is there anything I can do?
Edit: I've gotten negative votes already. Where else would I put a question about the google foobar python challenges? Also, I'd prefer not to include the actual challenge or my code since it's supposedly secret, but if necessary I will do so.
Re-indenting the file seemed to help, but that might have just been coincidental.
Error with the google foobar challenges