Question : unity NetworkBehaviour the type or namespace could not be found
Answered by : alexandre-dao
For Unity 2020, I used Window > Package Manager and pressed the + (plus) sign:
Add Package from git URL and set it to: com.unity.multiplayer-hlapi
and com.unity.xr.legacyinputhelpers
Source : https://stackoverflow.com/questions/63260859/unity-networkbehaviour-is-missing | Last Update : Wed, 18 Nov 20