The VRayTeleportBP is separated as a plugin, just like V-Ray for Unreal, that you have to enable per project to use its functionality. To enable the plugin go to Settings > Plugins > Chaos Software >VRayTeleportBPand click the Enable checkbox. You will need to restart the Unreal project to use the plugin.
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In order to use the VRayTeleportBP in a packaged project you need to enable it in the Game Mode for this level. To do this Window > WorldSettings and in the Game Mode category choose VRGameMode in the GameModeOverride drop down menu.