e-file error message even after file was accepted

Hi - I submitted my taxes for e-filing and immediately got an error message "Oops - an issue occurred. Please check back shortly." Within about 30 minutes, the status was updated from pending to accepted and I received an email from TurboTax telling me that my return was accepted by the IRS. And yet the error message persists. 

 

How can I find out what issue occurred and what, if anything, needs to be done to resolve it?