Got 500 error when loading a SSRS report from ASP.NET Core Razor page via iframe to a webform?

Question

I implemented an ASP.NET Core Razor pages app to display a SSRS report by iframe to a .NET framework webforms on VS 2022.

I deployed the .NET framework webforms and SSRS report to each server and tested I can display the report on the webforms without issues.

Now I run the razor page on VS 2022 to display the SSRS report and got 500 error from Inspect (Developer tools) as follows:

enter image description here.

How to solve this issues? Thanks