I have some information about the bank error 185, @userdiego1.
This error means your bank requires additional security measures (MFA or OTP) every time an update occurs. There's no way to get around this since it's a bank requirement. This is why the error goes away and then comes back after selecting update from the Banking tab.
If there are missing transactions in your bank feed center, you'll want to upload them manually through WebConnect. Please refer to this article for the step-by-step instructions: Manually upload transactions into QuickBooks Online.
I'm also attaching this link here if you need help with other tasks in QBO. Just look for responses that fit your concern.
Keep me posted if you still have questions or concerns with bank transactions. I'll be around for you. Take care and more success to your business.