Add the guide source used for your region and lineup. Portico imports the schedule and attempts to match guide channels to the channels discovered from the Live TV source.
Review every unmatched or ambiguous channel. A wrong mapping can schedule the wrong programme even when live playback itself works.
Guide imports run as server work. Keep the source credentials current and schedule refreshes often enough to cover the recording window you rely on.
When programmes disappear from the guide, check the last successful guide refresh before deleting and recreating the channel source.