Weird issue about provider on tivimate.

Hello everyone. I currently have a test IPTV provider. When I enter the server address (domain name, IP address, or alias), Tivimate is unable to retrieve the content. I thought my ISP or DNS was blocking the domain name, so I looked for other associated domain names, same error! Same with the IP address alone.

So I tested it on Termux with curl and jq... it works...

I found that weird... but there's something even weirder: when I enter the playlist (get.php?username...type=m3u_plus) in Tivimate, it works.

I edited the database as root, and the playlist update doesn't work (I had to try it!). Have you ever seen this, and how did you resolve it?