Failed to play m3u, m3u8

[ppskj178]

I modified the same m3u8 url to create an m3u file and strm file and added them to Live TV and the library respectively.

It works perfectly in the web browser, but not on other clients. It didn't work the same on Android, but I was able to get around it via WEB. On LG TV, it didn't work on either the dedicated APP or the web browser.

Especially not even with the FMP4-HLS option turned on.

What else should I check?
Or is it a server issue?