One thing we can attempt here is to delete your main files dataset so we can resync it to see if we're able to get rid of the error. I'll leave an article down below on how to do so:
Note: you'll need to be on a different file to delete your main files dataset.
The above steps will only remove the cloud account of the file. The steps will not remove the actual data file. The cloud is what facilitates the online facilities of Quicken and at times, encounters sync issues like you are experiencing.
Please let me know how this goes, I look forward to hearing your response.
Someone correct me if I'm wrong, but doesn't USAA require a special PIN number instead of the website's logon ID when using Direct Connect?