IPTV EPG Not Working — Restore Your Programme Guide

If channels play but the guide is empty or shows the wrong times, check the EPG configuration separately from the video stream.
IPTV Invalid Login — Check Credentials and Account Access

An invalid-login message can come from the wrong account format, a copying error, an inactive account or a connection limit. Check those in order before reinstalling.
IPTV Not Working — A Step-by-Step Troubleshooting Guide

When IPTV is not working, identify the symptom first: app failure, login error, missing playlist, empty guide or interrupted playback. Each needs a different check.
IPTV Buffering — Find the Cause of Playback Pauses

IPTV buffering means the player is waiting for enough media data to continue. Compare sources, the device and the connection before changing several settings at once.