Occasionally a token gets corrupted and causes this. Try deleting the gmail integration and do it again from the beginning. Go to Profile > Integrations > delete, then connect the account again. If this still produces an error, let me know here and we'll dig deeper. 

Hi, I'm getting the "something is wrong" error when trying to connect my gmail account as well. When I go to the Integrations page, there is no existing account to delete. Are there other things I can do?