6 days now keep getting code 103.Can not log in no matter what I do

There are a few reasons why you get the banking error, gvpropertymainte.

Error 103 occurs when the credentials entered in QuickBooks Online don’t match with what your financial institution has. If you updated anything on your bank’s website, like your account number, username, or password, update QuickBooks as well.

Let's log in to QuickBooks through a private browser and update the bank information from there. It helps us get rid of unexpected behaviors that are sometimes caused by stored cache files. 

Let me show you how: 

1. Go to the Banking page.
2. Click the blue bank tile you'll need to update.
3. Select the pencil icon and click Edit sign-in info. 
4. Update the information. 

Once updated, let's manually download to get the latest available transactions. Still on the Banking page, click the bank and hit Update. If transactions are still not downloading, you might want to manually upload your bank transactions.  

Keep me updated on how this works. I'll surely keep an eye on it.