Hello there, Brian.
I can help you troubleshoot the error you're currently prompted when using our new feature. There are a few possible reasons why you're seeing the error message. One can be a browser-related issue which was shared by Charies_M. You can follow the troubleshooting steps if you haven't yet.
Another might be you have multiple line items on your invoices, line items such as bundle. For now the feature is still progressing in supporting batch editing on invoices that have discounts, attachments, price rules, and multi-currency. Since these fields are not supported yet.
If you don't have these fields and line items on your invoices and still getting the same error, I suggest reaching out to our Phone Support Team. There can still be specification we can modify that can help your convenience.
Here are a few links that you can check out to help you manage your invoices:
Feel free to visit us again and post some more of your concerns. We're always delighted to be of your service.
