Good morning, @btsbcl.

We can perform some troubleshooting to see if this is a browser-related cause.

I'd like to start with opening a Private Window or an Incognito Window in your web browser. This will open your account in a clean slate and loads fresh data. Here's how:

• Mozilla Firefox / Internet Explorer: Press CTRL + Shift + P
• Safari: Press Command + Shift + N
• Google Chrome: Press CTRL + Shift + N

Once you're in the Private / Incognito Window, sign in to your QuickBooks Online account and try to work within these transactions.

If you receive no errors, then you can go back to your original browser and clear the cache. Alternatively, you can use other compatible browsers.

Let me know how this goes for you! If the issue persists or you'd like further assistance, please don't hesitate and reach back out to me.