Send Receipt Error version 3.1.12

Hello,

I'm experiencing an error when using the 'Send Receipt' form to send a customer a payment received error. In the Chrome DevTools inspector panel, the console errors display as follows below. However, I have no problems sending the invoice to customer. That form works without any errors.

[Deprecation] Listener added for a 'DOMNodeInserted' mutation event. Support for this event type has been removed, and this event will no longer be fired. See https://chromestatus.com/feature/5083947249172480 for more information.

POST https://{domain.com}/accounting/1/modals/transactions/273/emails 500 (Internal Server Error)
(anonymous) @ documents.min.js?v=3.1.12:387
xhr @ documents.min.js?v=3.1.12:387
at @ documents.min.js?v=3.1.12:387
Promise.then
_request @ documents.min.js?v=3.1.12:387
request @ documents.min.js?v=3.1.12:387
(anonymous) @ documents.min.js?v=3.1.12:387
value @ documents.min.js?v=3.1.12:1
onSubmit @ documents.min.js?v=3.1.12:1
Kn @ documents.min.js?v=3.1.12:387
n @ documents.min.js?v=3.1.12:387
Kn @ documents.min.js?v=3.1.12:387
e.$emit @ documents.min.js?v=3.1.12:387
onSubmit @ documents.min.js?v=3.1.12:375
Kn @ documents.min.js?v=3.1.12:387
n @ documents.min.js?v=3.1.12:387
Us.s._wrapper @ documents.min.js?v=3.1.12:387Understand this error
documents.min.js?v=3.1.12:1

Thanks for your assistance.