I started a stream from OBS and kept it running.
The HLS URL
https:// simulcast . me/hls/8e4551823a23f584/index . m3u8?apiKey=...
loads in the Akamai hls .js player, but it only shows a black screen and stops after ~8 seconds even though OBS remains connected and streaming. No errors, just a short black clip.
Your client can reach his HLS.
The problem is the content/encoding, not your player.