Fixed detecting

Author: xxsnakerxx

lib/util/stylesheet.js

@@ -99,6 +99,7 @@ const astHelpers = {
       node.init &&
       node.init.callee &&
       node.init.callee.object &&
+      node.init.callee.object.name &&
       node.init.callee.object.name.includes('StyleSheet')
     );
   },