I can imagine what you must be going through, fsbridger.

Not to worry, I'm here to help you fix this error message.

Let's install and run the QuickBooks Tool Hub on your computer. This helps fix common errors. For the best experience, we recommend using the tool on Windows 10, 64-bit. Here's how:

1. Close QuickBooks.
2. Download the most recent version (1.5.0.0) of the QuickBooks Tool Hub. Save the file somewhere you can easily find it.
3. Select the Home tab. The version will be on the bottom.
4. Open the file you downloaded (QuickBooksToolHub.exe).
5. Follow the on-screen steps to install and agree to the terms and conditions.
6. Once done, double-click the icon on your Windows desktop to open the tool hub.

Then, I'd suggest running the Quickbooks Install Diagnostic tool. This automatically diagnoses and fixes issues with Microsoft components the QuickBooks program uses. I'll show you how:

1. Open the QuickBooks Tool Hub.
2. In the tools hub, select Installation Issues.
3. Select QuickBooks Install Diagnostic Tool. Let the tool run. It can take up to 20 minutes.
4. When the tool finishes, restart your computer and open QuickBooks.

If the issue persists, I'd recommend following Solution 2 in this article: Fix Error 1904.

In case none of these fixes the error, please contact our QuickBooks Support Team. They're equipped with tools to check the cause. It'll also allow them to submit a ticket to our engineering team to alert them about the issue if necessary.

Additionally, I've added an article that'll help you manage your vendor transactions in QuickBooks Desktop. This keeps your books accurate: Expenses and Vendors.

Keep me posted on how the steps fix the error message. I'm always here if you need further assistance. Wishing you continued success!