migrated from sourceforge tracker https://sourceforge.net/tracker/?func=detail&aid=1797126&group_id=93991&atid=606303 Hello, there are still projects out there, which do not depend on JSP v2. Those taglibs wont have any class deriving from the SimpleTag-Class. But the current version (2.3.1) of the plugin depends on being able to load the SimpleTag-Class. I have attached a fix for the ValidateRenderer, which makes a distinction between jsp < 2 and jsp >= 2. It assumes, if it can not load the SimpleTag, that the taglib will only have tags with jsp < 2. An error will be thrown anyways, if a tag is instantiated from the tld, which derives from SimpleTag class, but the SimpleTag class can not be found. So the renderer does still validates.