I have the solution!
I had this same problem and looked through all the forums and didnt find this solution
2 reasons it wont connect
1: the PC`s firewall , add the ipad pro as a trusted device in your antivirus software ( i use norton) yould need to find the ipads IP address on your network (look in the wifi section of setting)
2: When IC pro opens the option is " Enter IP of Computer" , this is incorrect because if you need to enter the IP address of Cubase on your computer which is different , this IP address is given to you after you install the remote SKi addon to cubase and its added as a remote device