solved
Hi all you must copy and past the entire file inside C:\Program Files\NewTek\NDI SDK for Unreal Engine\PluginBuild"UE_4.25" or UE_4.26 in to C:\Program Files\Epic Games\UE_4.26 or UE_4.25 or 4.24 \Engine\Plugins
plz don’t copy only NDIIO file you must copy the UE_4.25 or UE_4.25 or UE_4.24 File
have fun