The fastest way
Open Home Reels, go to Settings › Support › Send feedback, and describe what happened. The app attaches its version and your device model, which is usually what we need to find the cause. Leave your email if you'd like an answer. You can also write to support@homereels.app.
Common fixes
A video isn't showing up
Check Your clips › Not included for that month: portrait videos, screen recordings and downloaded videos are left out until you add them. Videos still uploading show their progress on the same screen; uploads need Wi-Fi unless you change Settings › Uploads.
"Family storage is full"
Remove clips you don't want, or lock a finished month: its clips leave the cloud and the movie takes a fraction of the space. Settings › Family shows the total.
The Apple TV app shows nothing
Sign in with the same Apple Account as your iPhone. The Apple TV uses the iCloud account of its default profile.
An invite link doesn't work
Links work for 7 days; ask for a new one from the person's Settings › Family. A person can be in one family at a time; leave the current one first (Settings › Family › Leave family).
Deleting your account
Settings › Account › Delete account removes your clips from every month, takes you out of your family, and deletes your profile and sign-in. Finished movies your family locked stay with the family.