What were the errors that you got?
Viewing post in Multiplayer Battle Wizards comments
First one is:
Multiple precompiled assemblies with the same name Newtonsoft.Json.dll included on the current platform. Only one assembly with the same name is allowed per platform. (C:/Unity Projects/Battle Wizards/Library/PackageCache/com.unity.nuget.newtonsoft-json@3.0.2/Runtime/Newtonsoft.Json.dll)
Second one is:
Multiple precompiled assemblies with the same name Newtonsoft.Json.dll included on the current platform. Only one assembly with the same name is allowed per platform. (Assets/MultiplayerBattleWizards/Photon Unity Networking/Editor/PhotonNetwork/Newtonsoft.Json.dll)
I already installed and imported Photon to the Project. (Also thanks for the fast reply!)