I have already tried this before, it just doesn't matter. Except your HTML viewer provided in Telerik Reporting packages, all requests sent to Telerik Report Services (running on .Net Core target .Net Framework) will result in 415 error.
This does not happen if I have the Telerik Report Services running on pure .Net Framework.
Could you confirm with the Tech guy and give me some solution on this?. This is quite essential for me to get a demo example working for my company next meeting