Unable to create a case

My colleague is able to create a case no problem from their computer using postman. However, when I take the same rest endpoint and use postman, I get the following error.

{
"timestamp": "2018-09-26T18:39:12.550+0000",
"status": 500,
"error": "Internal Server Error",
"message": "No message available",
"path": "/bpm/rest/case-definition/key/Test/tenant-id/Shaquille/create"
}

The logs are showing

19:00:05.657 [http-nio-8080-exec-9] ERROR o.a.c.c.C.[.[.[.[.c.b.s.b.s.r.CamundaJerseyResourceConfig] - Servlet.service() for servlet [org.camunda.bpm.spring.boot.starter.rest.CamundaJerseyResourceConfig] in context with path [/bpm] threw exception [java.lang.NullPointerException] with root cause
19:00:05
java.lang.NullPointerException: null
19:00:05
at org.camunda.bpm.engine.rest.sub.repository.impl.CaseDefinitionResourceImpl.createCaseInstance(CaseDefinitionResourceImpl.java:120)
19:00:05
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
19:00:05
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
19:00:05
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
19:00:05
at java.lang.reflect.Method.invoke(Method.java:498)

Hi,

It seems that your parameters are not correct.
Could you please share your reset request.

Best regards,
Yana