I'm working on VR projects in Unity and several times with different projects and versions of Unity Editor I got this error:
DllNotFoundException: NatNetLib assembly:<unknown assembly> type:<unknown type> member:(null)
NaturalPoint.NatNetLib.NatNetClient..ctor () (at Assets/OptiTrack/Plugins/Managed/NatNetLib/Client.cs:330)
OptitrackStreamingClient.OnEnable () (at Assets/OptiTrack/Scripts/OptitrackStreamingClient.cs:866)
UnityEngine.Debug:LogException(Exception, Object)
OptitrackStreamingClient:OnEnable() (at Assets/OptiTrack/Scripts/OptitrackStreamingClient.cs:926)
windows 11 Pro 64bit,
unity 2022.3.15f1 / 2022.3.20f1
motive 2.3.6
Optitrack Unity Plugin 1.4
I tried the solution presented in https://forums.naturalpoint.com/viewtopic.php?t=19999, but it doesn't work.