When try to Minify files under clientlibs using JsProcessor, facing some Console errors and the files are not minified too.

Console errors

Uncaught ReferenceError: $jscomp is not defined

because its MIME type ('') is not executable, and strict MIME type checking is enabled.

USING AEM 6.4

jsProcessor="[default:none,min:gcc;languageIn=ECMASCRIPT_2015;compilationLevel=whitespace]"