I've checked the app now. There are two problems:
http://localhost/reportserver to http://localhost/ReportServer
reports. For example MyFolder
It works! Thank-you-so-much!
The answer is you cannot use:
http://{{YOUR SERVER}}/reportserver
You must use:
http://{{YOUR SERVER}}/ReportServer
Glad it worked! I’ll do my best to include fix to ignore the case in the next update.
Also it works on my 2016 (13.0.1601.5) SSRS too!
Yep, the issue was fixed immediately and the fix will be part of our next update!
Everything works fine locally, but, when I deploy to Azure (using the Deploy wizard on the deploy section). I get:
You probably need to change the report server setting as it seems to have an extra /443/ in the path. Again you can compare the URLs used with and without proxy.
This is what I have in the settings:
I don't have 443 in the settings at all.
This works fine locally, it only stops working when I publish to Azure.
Thanks
Then the only option is to compare the generated URLs with and without UseProxy. Unfortunately we don't have a SSRS hosted in Azure and cannot test.
I sent you the project by private message 
Follow up: Radzen version [2.44.8 - 2020-04-02] fixed the issue with the Report viewer working on Azure.
Hello,
for my part, using 2.46.2 I got this when using proxy.
At the Radzen app, here is what shown
And the Custom ReportController is like this
