Adrian is asking why custom modules aren't showing up in the sandbox page editor after import, despite the files existing. Module IDs differ from production.

Nicholas suggests that sandbox auto-migration is unreliable. He recommends manually copying the theme/modules using the Design Manager's copy feature (shown in video) or the HubSpot CLI. Relying on relative paths instead of module IDs internally is also advised. Starting with a fresh sandbox might also resolve inconsistencies.