Request processing failed; nested exception is java.lang.ClassCastException: class java.lang.Integer cannot be cast to class java.lang.Boolean (java.lang.Integer and java.lang.Boolean are in module java.base of loader 'bootstrap') code example
Example: class java.lang.Integer cannot be cast to class java.lang.Long (java.lang.Integer and java.lang.Long are in module java.base of loader 'bootstrap')
// on my case, instead of casting I did:
Long variable = Long.valueOf(variable.get("Attribute").toString());