create ContentInstance has high possibility get "RPC error"

3.12 Valid contentInstance under CSEBase/container with name
[Documentation] Valid contentInstance under CSEBase/container with name
${attr} = Set Variable "cnf": "1","or": "http://hey/you","con":"102"
${r} = Create Resource ${iserver} InCSE1/containerUnderCSE ${rt_contentInstance} ${attr} conIn1
${name} = Name ${r}
Response Is Correct ${r}

The above create a contentInstance named "conIn1" under a container which is under CSEBase.

This step gets high possibility get "500 RPC error"