After several minutes of debugging and tries i found out that the error is generated by old syntax in selecting elements. It used jQuery(this).find("img[@src$=.png]").each(...); instead of jQuery(this).find("img[src$=.png]").each(...);

So the fix is: Remove the “@” character form the selector string.

The same thing for the “pack” version except that the replaced string is: [@m$=.M] and the replacement string is: [m$=.M].