Regen Thumbnail doesn't work

Throws up this error and messes up the existing image. Author doesn’t bother to respond to the forum issues.

function (){if(l){var t=l.length;(function i(t){x.each(t,function(t,n){var r=x.type(n);”function”===r?e.unique&&p.has(n)||l.push(n):n&&n.length&&”string”!==r&&i(n)})})(arguments),n?o=l.length:r&&(s=t,c(r))}return this}

http://ww.wp.xz.cn/plugins/regenerate-thumbnails/