"Send" command not executing - Error "..doesn't understand the "send""

Hello all,

I am working on a simple script to forward an email while changing the subject and setting the recipient. Currently the code works fine until it tries to send, where I get the error “Mail got an error: outgoing message id 67 doesn’t understand the “send””

Here is the code:

tell application "Mail"
	set theSelection to selection
	set theForwardedMessage to forward (item 1 of theSelection) with opening window
	tell theForwardedMessage
		make new to recipient with properties {address:"email@placeholder.com"}
		tell application "System Events" to tell process "Mail"
			set value of text field 3 of window 1 to "Automator Workflow 12345 - AutoSaveAttachments"
		end tell
	end tell
end tell

Anyone have any idea as to why it doesn’t recognize the send command? It compiles and runs but breaks at that line.