Can't send email to customers

[ehon]

I just upgrade to Ver. 1.2.9. Before that, I didn't have any problem to send email. Now when I want to send a message to my customers, I get this message "Please set up Task API Key in the settings!"

What do I need to do to fix the problem?

Thank you.

[abantecart]

This is because of upgrade to newer version that use task system
You need to go to settings -> API and enter some random key for "Tasks API Key"