See TheFoyer’s answer above. UE doesn’t support input events from Vive Trackers, so they cause crash. Still no fix in 4.19, so i’ll try add a new bug report via new form
File to edit:
[Engine/Plugins/Runtime/Steam/SteamVR/Source/SteamVRController/Private/SteamVRController.cpp] file.
Add this lines after line 237 (within the for() loop):
Buttons[SpecialIndex][ESteamVRControllerButton::TriggerPress] = FGamepadKeyNames::PadUp;
Buttons[SpecialIndex][ESteamVRControllerButton::Grip] = FGamepadKeyNames::PadDown;
Buttons[SpecialIndex][ESteamVRControllerButton::TouchPadPress] = FGamepadKeyNames::PadLeft;
Buttons[SpecialIndex][ESteamVRControllerButton::ApplicationMenu] = FGamepadKeyNames::PadRight;