Thanks for raising your recurring invoice template concern here in the Community, abrackin.

Encountering unexpected issues in a once seamless procedure can be challenging. Let me provide clarity on why you're receiving errors while saving the template without any specific areas on the invoice that need correction.

We currently have an ongoing investigation about recurring templates that weren't saved due to one or more errors. Our product engineers are closely working to come up with an immediate resolution. I recommend contacting our Customer Support team to be added to the list of affected users. This way, you'll receive timely updates regarding this issue via email.

Please follow these steps to reach them:

1. Go to the Help menu, then select the Search tab.
2. Click Contact Us.
3. Choose a topic, then enter a brief description of your concern and hit Continue.
4. Pick either Chat with us or Have us call you and start connecting with them.
   
   

You can review our support hours to ensure you'll receive help accordingly.

While we work on a solution, you may consider manually creating the invoice and sending it to the scheduled date. 

Moreover, you could learn more about adding specific information to your sales forms and tailor their looks to add branding to your business by exploring this article about the process: Customize invoices, estimates, and sales receipts in QuickBooks Online.

In addition to that, here are some links that will take you to our self-help articles that will come in handy for managing sales transactions, processing payments, modifying sales forms, and other customer-related tasks:

• Sales and customers QuickBooks Online.
• Invoices and payments QuickBooks Online.

I appreciate your continued patience while we're working on a permanent solution. Know that I'll be available on this thread if there's anything else you need assistance with when managing recurring templates and transactions. I'll get you covered. Stay safe always!