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Welcome aboard to the Community space, @aedoming.
I've looked into our end and find no related issue in connecting with USAA. To isolate this, I recommend contacting your bank and verify if there are any issues ongoing on their end.
In the meantime, let's manually upload your bank transactions. Let me guide you how.
You can also see this link for more guidance: Add older transactions to QuickBooks Self-Employed.
Once done, you'll want to categorize your transactions on the correct line of your Schedule C for accurate tracking.
I'm always around to help if you need furthers assistance managing your transactions. Keep safe and stay healthy!