I recently updated our MAS to build 51.21 ( from the previous 50 build ).
I noticed today that the HDX insight is not working any longer.
It displays 0 users. The Web insight and gateway insight are working. We also didn't change anything to the AppFlow settings.
I already tried to disable / enable AppFlow but this doesn't fix the problem.
Do you need to enable the general option NetScaler Gateway on the Appflow settings page?
Our NetScaler VPX is on version 11.1 build 50.10nc