You can follow some of the recommended troubleshooting steps below, Calvds.

If you're using QBO Desktop App, all you have to do us is to clear the cache. You can do this by following the steps below:

1. Click the Help icon at the top.
2. Select Reset App Data.
3. Click the Run as Administrator.

If this won't help fix the problem, you can try uninstalling and reinstalling the program. 

Here's how to uninstall:

1. Drag the QuickBooks Windows app from the Applications folder to the Trash.
2. Go to Finder then choose Empty Trash to completely remove the app.

Here's how to reinstall:

1. Select the QuickBooks.dmg file in the downloads section.
2. Drag QuickBooks to the Application folder.
3. Launch the QuickBooks App from the Application folder.
4. Then, select Sign In if you have a QuickBooks Online account.

However, if you're using the browser when logging in to QuickBooks, you can try using an incognito window. If it works fine, go back to your regular browser and clear the cache. You can also use other compatible browsers with QuickBooks.

Give me an update by replying to this thread on how these steps go. Have a good one.