when i hit server i am getting java.lang.IllegalA...

# server

[silentsudo]

when i hit server i am getting
java.lang.IllegalArgumentException: Parameter specified as non-null is null: method mypkg.repository.data.Department.<init>, parameter name
at mypkg.repository.data.Department.<init>(Department.kt) ~[classes/:na]
at mypkg.repository.data.Department.<init>(Department.kt:9) ~[classes/:na]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_131]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_131]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_131]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_131]