@Clayton44333
You can use the latest Hen v2.1.1 you dont have to use 1.7 or 1.8.
The 'CUSA07994_00 is not on the ps4' message is normal. That is just showing you that PKG Linker has looked on your PS4 and CUSA07994 is not already installed.
When you click on the 'Install Package' button a popup should appear on your PS4 and it should start installing.
Have you made sure that the 'Remote Package Installer' is left open on your PS4 when trying to send the PKG's?
Have you had any requests to allow the programs in your firewall? If not temporarily disable your firewall to see it that is causing the problem.