I am looking for step by step instruction on configuring custom extension and using them in Mashup using Visual Studio.
I have installed the custom extension sense-UI field on the Qlik Sense server, and able to use in the hub in the app.
When I try to use the customer extension in MVC project in Visual Studio(steps as per Qlik help website), I see the following display of Invalid visualization. I researched in community and Qlik help but could not find any good answer for the issue.
Proof Below :-
Added response header "Access-Control-Allow-Origin = * " to the preflight request and below is the custom extension rendered without any issue.
Support ticket to Qlik to enable CORS, or allow access to the request origin may solve the issue.
Without "Access-Control-Allow-Origin" response header, custom extension will not be shown.