Reproduce:

• Import a file with the following content:

  {
    "userId": "thisisanordinaryuserid",
    "userPassword": "!§$%&/()=?",
    "userFirstName": "Üßgart",
    "userLastName": "där Schröckliche",
    "email": "uessgart.der-schroekliche@gmx.de"
  }
  

Expected:

• Backend response is a JSON object with a valid errorCode that can be used to display an error notification

Observed:

• Backend response is

  Missing type id when trying to resolve subtype of [simple type, class org.camunda.optimize.dto.optimize.rest.export.OptimizeEntityExportDto]: missing type id property 'exportEntityType'
   at [Source: (org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$UnCloseableInputStream); line: 7, column: 1]