Recently, while I was accessing the QB application, I got stuck with QuickBookBooks error code 102 . It might occur when your bank website is undergoing maintenance. Also, this error might be evoked when the server comes across some issue when sharing information between QBO and the bank website. However, while searching on the internet, I found the following reasons besides the occurrence of this error. If you are login to your bank account with inaccurate login credentials. Error Code 102 might evoke when there is any network connection issue with your Operating System. This error might occur when you get an error message. Also, it arises if you have a new bank account and online banking is not yet started.