Zomboided not available

I’m trying to install a VPN. The 2023 tutorial of pptp will not connect (despite verifying all info is correct).

Moved to zomboided tutorial, downloaded zip, go to add-ons → install from zip → no zomboided. Why?

Unknown 3rd party allowed.

Seems your downloaded zip may not be in the location you are looking. Sounds like you should confirm the location.