windows phone 8 outlook doesnt sync

My outlook email is synced to my windows 8 phone.  It worked fine for a few weeks, then since yesterday, it no longer updates my new emails.  I already tried deleting the account and setting up a new one and it worked for the first new email I got, then stopped working again.  I also tried deleting emails and resetting to fewer days storage, but that didn't work either.   I can still see the old emails but it doesn't update new ones.  The error message I get is: "We're having a problem syncing your information.  Try again later."

I also downloaded an overdrive ap and an audiobook.  Would this have caused the problem?