I appreciate you for gettingback to us, LWAY1.

You can run some steps to isolate what causes the persistence error.

To start with, try voiding or deleting the invoice through an incognito window. This is the best place to identify any browser-related issues. You may use these keyboard shortcuts to open one:

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

If it works, you can go back to a regular browser and clear its cache. A piled cache can also be the reason for some unexpected issues on the opened pages.

You can also use a different browser like Google Chrome, Mozilla Firefox, Safari, or Microsoft Edge.

Afterwards, you're good to recreate the invoice.

Also, if you want to take and process payments online, you can check this guide: Process customer payments.

Keep me posted as to how these steps work on your end. Keep safe!