You see these come up in various forums and there always seems to be something you give up in exchange for the big tablet center console.
There are limits to what will interface successfully with an LR3- the oldest LR3's are 20 years old this year. Getting the LR4 navigation display working in a LR3 takes some effort.

 

Yeah, I am personally not a huge fan of those larger tablet conversions. I have a second CarPlay unit coming after having a hole in my dash for almost a year since I did not feel like putting the D4 display back in after my first CarPlay unit faulted and I returned it. The small ones I like, no functions lost and many gained like showing which parking sensor is going off and retaining the 4x4 display, etc.

And specific to this, I would say contact the seller for support but based on my first CarPlay unit help I can see they are pretty useless. So I get it. The problem is not many of use have experience trying to diagnose issues with them.