Welcome to this thread, @clearly_not_an_accountant. I appreciate you for checking us about the investigation update. 

Our engineers have found a fix for this issue and are currently available in the Beta version of the web app. We expect this fix to be released early next week. 

In this regard, I'd suggest you update your app to ensure that you can access payroll without any further issues. Should you wish to try the beta version of the desktop app, visit the macOS link: https://http-download.intuit.com/http.intuit/CMO/qbo_client_web_dev/static/release/mac/latest/QuickB.... 

For additional reference, here's an article that you can use to lodge a pay event once a pay run is finalized: Create and lodge a pay event. It also contains some FAQs about this process.

Let me know if you have additional questions. I'm always around here to help.