Nice to have you joined this thread, Deyna. I want to make sure I provided you with the best fix so you can save your journal entry without error.

Unexpected behaviors in QuickBooks Online are sometimes caused by a browser-related issue. The stored cache can affect the performance of the program.

To resolve this, I'd suggest logging in to your QuickBooks Online account via a private window. This doesn't use the existing cache files, which makes it a good place to determine if there's an issue with the browser.  

Here are the keyboard shortcuts: 

• Safari: Command + Shift + N 
• Google Chrome: CTRL + Shift + N
• Mozilla Firefox or Microsoft Edge: CTRL + Shift + P 

Once signed in, try creating a journal entry again. If you're able to do so, let's clear the browser's cache. This removes its stored files to ensure the program performs efficiently.

You can also use other supported browsers. They'll provide the best and most secure experience with QuickBooks. 

If the issue persists, I'd suggest contacting 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.

In case you've created a journal entry by mistake, you can reverse or delete it in QuickBooks Online. This ensures your books are accurate.

I'm only a post away if you need more help in managing your transactions in QuickBooks, Deyna. It's always my pleasure to help you out again.