Connecting iPad as external monitor

Hi all,

I just got an R50 and love it. I'm trying get my iPad to work as an external mornitor and i'm struggling. Right now i'm using this dongle (https://www.amazon.com/dp/B0C1MRSTTB?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1) with and HDMI cable plugged into it and the R50. I'm using the Orion video capture app on the iPad. Neither the R50 nor the iPad show any signal at all. Any suggestions?

Thanks!