Error while mapping module function result to rest endpint uri params

Summary

Cannot assign a primitive value to a target with 'object' type

Content

We have a simple use case of calling a module which constructs the url params that needs to be appended to rest endpoint. The function is returning the value correctly but while assigning the function result to rest endpoint uri params, VBCS is throwing the below error :

Cannot assign a primitive value to a target with 'object' type