Unreal Engine 4 plugin, device not registered/known

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Hello! I specified full path of team speak 3 sound backends to function: Code: --------- UTeamSpeakFunctionLibrary::TeamSpeak_initClientLib(ETeamSpeak_LogTypes::LogType_FILE, log_folder, res, error); --------- My path is "D:/UNREAL/Flying/Plugins/TeamSpeak_SDK/ThirdParty/TeamSpeak_lib",... Unreal Engine 4 plugin, device not registered/known