Hello, I have updated to v.1.2.16 and since I cant get any message to work. All messages generated makes this error in the log.

AbanteCart core v.1.2.16 Class 'Mustache_Engine' not found in <b>/home/axesstek/public_html/store/core/lib/mail.php</b> on line <b>209</b>

Anyone had this problem ?