When using a VPN, your public IP changes—sometimes even to a datacenter IP that's already blacklisted by your IPTV provider or flagged for abuse. This triggers IP bans or rate-limiting. Also, many providers implement geo-restrictions or anti-fraud systems that block multiple users streaming from the same VPN IP. To resolve it, use a residential VPN or whitelist the VPN IP in Xtream UI (IP Whitelist settings). You can also check /var/log/auth.log for failed access attempts due to IP mismatch.