This isn't the kind of experience we want you to have when processing payments in QuickBooks Online (QBO), lmonk1.

I'm here to help you process your payment successfully.

Trying a few basic troubleshooting steps can help resolve the error, using a private browser or incognito window to help eliminate any error that can be occurring in the system. Here's how depending on your session: 

• Google Chrome: Ctrl + Shift + N
• Internet Explorer/Firefox: Ctrl + Shift + P
• Safari: Command + Shift + N

If this works, go back to your regular session and clear your browser's history. If it doesn't work, then I recommend trying a different supported browser. 

If the error persists, I'd recommend contacting our Payments Support Team. They have the tools to verify your account and check further what has caused the error.

You may also consider visiting our reference page to check out any similar articles for your future tasks: Help Articles.

I'll be waiting here for your response if still have questions with payment concerns. Have a great day!