i have unpacked fortnite but i have problem launching the editor

it tell me that the alembicimporter plugin is missing and also the applelmageutils appsflyer backchannel geometrycache lmgmedia mediacompositing remotesession firebase udpmessaging and landmass plugins are missing too and then it tell me that there is some modules are missing or built with a different engine version and its ask me if i like to rebuild them now i click yes and it tell me “fortnitegame could not be compiled, try rebuilding from source manually”

Are you attempting to use the Unreal 4 Editor with Fortnite? Unless I’ve completely missed some news about allowing mods to be built or something this is not possible.