Media Player stream failing to start

[Oh-Low]

I'm having an issue where after pressing the stream button with a single media player Queued I get the "Streamer running" prompt for about a second before the prompt just closes.

-On an Rpi4 B 2g running Raspberry pi OS 64bit -Tried with various .MP4 and .AVI files with same result -Image player streams NDI just fine -Screen Grabber appears to be having the same issue.

Thanks!!!!