Sap destination UnknownHostException

Hi, I have a question about sap cloud platform and mendix development. I can deploy my application to the SAP cloud platform, I can run the Get Destination microflow and show the details on screen but I cannot use the Get List. What are the query parameters I should use when working with a destination? Should I change the constants value for service url? I try to use a very simple example to get some data.  
1 answers

on-Premise system.

We changed from https to http but still the same error.

Do we need to change the default value of our imported service? Now it starts with /sap/opu/odata/sap... or should it be http://....