Whenever I try to change the status of an invoice to "Mark as Paid" I get an error message that says "Transaction typeInvoice: 1000000107".

You can perform some troubleshooting steps to help clear your browser's cache, Katherine.

To rectify this error when changing your invoice status to Mark as Paid, let's clear your browser's cache to prevent related discrepancies. Refer to these links for guidance:

• Firefox
• Google Chrome
• Safari for Mac
• Safari for iPad and iPhone
• Microsoft Edge

However, if the issue persists, you can utilize other supported browsers.

For any additional queries, let me know in the comments below.