UCMDB DataFlowManagement API give Internal server error

Hi Team, 

we want to use UCMDB WEB API to add the IP range on Probe and similar kind of operations. As per documentation , first we get the token from  /rest-api/authenticate and then use this token on other API calls. We successfully get this token , but now when call other API with this token it's given "Internal server error". 

Do we need to do any other steps to make these API work? Attached snapshot of API calls.

We installed new DEV environment of UCMDB 10.33, we know this version is very old and out of support, but customer has this in prod and plan to upgrade in next 4 month.