i would infer you need a no-arg constructor on the...

# spring

[nfrankel]

i would infer you need a no-arg constructor on the deserialized object class 😉
either use the library proposed by @fitzoh :

With this module, single constructor classes can be used automatically, and those with secondary constructors or static factories are also supported.

or use the no-arg compiler plugin:
https://kotlinlang.org/docs/reference/compiler-plugins.html#no-arg-compiler-plugin