Thank you for posting here in the Community, @jessie-twinriver. 

Let's make sure to get rid of this error so you can proceed with printing your reports in QuickBooks Online (QBO). 

As mentioned by @Just_me we can perform some basic troubleshooting steps to fix this. It could be that the cache stored in your browser is causing the issue. Let's start by accessing your account through an incognito browser.  You can log into your QuickBooks Online (QBO) account in a private window. To do this, here's how: 

• Google Chrome: press Ctrl + Shift + N 
• Mozilla Firefox: press Ctrl + Shift + P
• Safari: press Command + Shift + N

Then, print the report again. If you're able to do so without any errors, you'll need to switch back to the main browser to clear the cache. You can also try using other supported browsers to isolate browser-related issues.

If the issue persists, I recommend calling our QuickBooks Online Support Team. They have additional tools to do a screen share and investigate this further. To ensure we address your concern on time, check out our support hours. 

In addition, you can also run several reports in QBO other than an expense and customize them to get the information you need. Please read this article for more information: Customize reports in QuickBooks Online.

If you have any other concerns about printing reports, please let me know by clicking the Reply button below. I'll be sure to get back to you.