Problem sending emails

A command that has been working for years has stopped working and showing the error alert
“ChannelCall Error: no active module for Email channel”

I am assuming that my code is failing here:

sendemail {
subject=“AutoPlot Tools Registration”

What does the error message mean, and can you tell me how to fix it?

That message refers to your choice in the Email Channel preferences. It would appear to have been reset. Hopefully, you just need to set it again.

If that doesn’t work, you may have to clear your preferences, and then set them.

Thank you !!