I've deployed a provider hosted app (hosted on Azure) in SharePoint Online.
In my solution I have an aspx page (with a button) and a Client Web Part to add the page in SP as an App Part.
All works fine but when I click on my button, doing a postback, I receive this error:
An error occurred while processing your request.
Debugging the solution, I see that on
Page_PreInit, the function
SharePointContextProvider.CheckRedirectionStatus(Context, out redirectUrl) returns
But I don't understand why...