FLinearTimecodeAudioCaptureCustomTimeStepImplementation::Init() asserts if no source device can be found. It should gracefully fail instead.
Activate the AudioCaptureTimecodeProvider plugin
Set AudioCaptureTimecodeProvider as Timecode provider
Restart the project without a source device connected to the PC
NOTE: Make sure that all recording devices on the PC have been disabled otherwise, it's going to pick up the microphone.
Assertion failed: AudioCapture.IsStreamOpen() [Link Removed] [Line: 47]
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-72406 in the post.