validationMessage = {ValidationMessage@3172} "$.diseases[0].diseaseStage: array found, object expected"
type = "type"
code = "1029"
path = "$.diseases[0].diseaseStage"
arguments = {String[2]@3178} ["array", "object"]
details = null
message = "$.diseases[0].diseaseStage: array found, object expected"
This means the type of an object was not as expected by the JSON schema. In our case, this likely means the schema needs to be adjusted.