Report embed in application

create a report on power bi desktop, then post it on report server, take the report url and put it in my web application as follows:

<iframe width = "1000" height = "800" src="http://xxxx-xxx-xxx-xxxx?rs:embed=true" frameborder = "0" allowFullScreen = "true"> </iframe>

and it didn't work, he showed me a blank page.

My web application is made in net core and I put the iframe on a razor page.

doing tests I tested the same iframe on a .aspx page and it worked

can you tell me how to make it work on razor

regards