LR Enfuse error

Hi, I've used LR Enfuse many times with no errors, but today it keeps saying. "Error running Enfuse, more information is in the file LRenfuse_log.text on your desktop."

The desktop file read: 

enfuse: warning: option "--contrast-window-size" has no effect as contrast
enfuse: warning: weight is zero
enfuse: no input files specified

What can I do to fix this? Anyone know?