QuickBooks Error 102 is a common banking error that occurs when there is a problem connecting to your bank's website or server. This error typically occurs when there is a maintenance or outage on the bank's website or when the bank's server is experiencing technical difficulties.

Some of the common reasons why QuickBooks Error 102 can occur are:
The bank's website is undergoing maintenance or updates.
The bank's server is down or experiencing technical difficulties.
Your login credentials for the bank are incorrect.
There is an issue with your internet connection or firewall settings.
Your QuickBooks software needs to be updated.
To fix QuickBooks Error 102, you can try the following troubleshooting steps:

Check if your bank's website is undergoing maintenance or updates.
Verify that your login credentials for the bank are correct.
Ensure that your internet connection is stable and that there are no firewall settings blocking the connection.
Update your QuickBooks software to the latest version.
If the problem persists, try logging in to your bank's website outside of QuickBooks to see if there are any issues accessing your account.
Contact your bank's customer support or QuickBooks support for further assistance.