DllNotFoundException: sdkencryptedappticket64

[Anadunee]

On the website its writtent that if im using Steam Encrypted App Ticket i should copy sdkencryptedappticket.dll in the next to steam_api.dll.
I have copy it to Library\PackageCache\com.rlabrecque.steamworks.net@a3fe809\Plugins but now im getting error that i dont have .meta data. And in unity editor still have:
DllNotFoundException: sdkencryptedappticket64 assembly: type: member:(null)
Steamworks.SteamEncryptedAppTicket.BDecryptTicket (System.Byte[] rgubTicketEncrypted, System.UInt32 cubTicketEncrypted, System.Byte[] rgubTicketDecrypted, System.UInt32& pcubTicketDecrypted, System.Byte[] rgubKey, System.Int32 cubKey