I went ahead and checked our records, Qwik. I haven't seen any open cases.
It can be caused by some browser hiccups. You can follow EdwardR's steps to isolate the issue.
Although, if you're still encountering the same issue after trying the steps, I'd suggest reaching out to our customer care support through phone, chat, or social media like Facebook or Twitter.
Here's how to reach out through phone or chat:
- Click Help inside QuickBooks Online.
- Select Contact Us.
- Enter "Unexpected Problem: -30000 when editing an invoice" in the description field, then click Let's talk.
- Select either Start messaging or Get a callback.
Once it's fixed and your customer pays, you can go ahead and record invoice payments.
The Community is open 24/7 to help you. Please feel free to let us know if you have other concerns.
