Login from the desktop is failing; however, the mobile access is working. What's up? QB says: "There's an issue on our end. We're on it." What's the matter?

Welcome to QuickBooks Community, userthereur. I'll share troubleshooting steps to make sure you're able to log in to your account from the QuickBooks desktop app.

There are times that your QuickBooks Online desktop app has a lot of data which causes unusual errors. To fix this, I suggest performing basic troubleshooting steps by resetting the app data to clear the cache and refresh it into its default state. 

Here's how:

1. Click Help on the navigation bar at the top.
2. Select Reset App Data.
3. Allow a moment for the process to complete, and then close the app.
4. Be sure to right-click the app and Run as Administrator when re-opening.

If you get the same result, I recommend uninstalling and reinstalling the QuickBooks desktop app. This is to ensure you get the most recent version of the application. You can click this article as it contains additional insight on the app and troubleshooting: QuickBooks App for Windows and Mac: General Support.

Please refer to this article to see a table list that contains different features that are supported on mobile devices: Compare mobile app features.

Let me know how it goes by leaving a reply below. Please know I’m only a post away if you need further assistance. Thanks for dropping by and take care!