Hello, @ahsu14.
I understand that this issue causes delay on your transactions. I have checked it on my end and this open investigation is closed. Try sending the invoice again and if you still encounter the sane error, I recommend contacting our QuickBooks online support team. They can guide you and provide you the steps on how to resolve this issue.
To contact support team, here's how:
- Log in to QuickBooks Online.
- Go to the Help icon and select Contact us.
- Choose Messaging.
Please check our support hours and call us at the time available for you.
Feel free to post any additional questions here in Community. Have a great day.
