What does error message: something's not quite right - unexpected problem : 37112 mean? This occurs when I copy and invoice, edit and then save to issue.

It's our top priority to provide the best invoicing features in QuickBooks Online (QBO), Pamela. I can share some solutions to fix the behavior you're getting.

I haven't seen any ongoing investigations related to this error message. To ensure a smooth experience, I suggest copying and working with your invoices in a private window. It'll help avoid any potential issues caused by the browser's cache. You can save time by using either of the following keyboard shortcuts:

• Google Chrome: Press Ctrl+ Shift + N
• Safari: Press Command + Shift + N
• Mozilla Firefox: Press Ctrl+ Shift + P

If it works fine, please return to your default browser and clear the cache to refresh the system. You can also try using another compatible browser to narrow down the result. If the issue persists, I suggest contacting support to investigate this further. 

On the other hand, you can run through the resources from this article for more hints while working with your invoices in our system: Create invoices in QuickBooks Online.

When you're ready to track your customer payments, record them through the Receive Payment window.

Let me know in the comment section below if you have follow-up questions while working following the resolutions provided to keep track of your invoices accordingly. I'm more than happy to help you again. Have a good one!

Thanks for the speedy reply, unfortunately, I am still getting the same error message. 

To break it down:

I select an invoice, duplicate it, edit as needed then press save. After pressing save the message appears. 

I have tried this with several different invoices as I thought it was specific to this one but it's now happening with each one I have tried. I'd appreciate your help as I have invoices to get out...

I understand the urgency of getting this issue fixed, Pamela.

I'll route you in the right direction of support to help you with this matter, as getting this resolved is our top priority, and rest assured that this will be taken care of.

Since you're still getting the same error message after trying out the troubleshooting steps provided by my colleague above and when doing it with several invoices, you can contact our QuickBooks Online Support Team. They have the resources to assist you further and can also raise a ticket with our engineering team if necessary.

Here's how you can reach to them: 

1. Go to Help (?).
2. From the Search tab, click Contact Us.
3. Please enter your question and select Continue.
4. Review and Select from the following: Ask the community, Have us call you, or Chat with us.

You can read through this resource to personalize and add specific information to your sales forms: Customize invoices, estimates, and sales receipts in QuickBooks Online.

I'm still ready to back you up if you need more help with invoices or sales transactions. I'll always be ready to assist you. Stay healthy always.