Rejected — Guideline 2.1: "We were unable to sign in" / demo account credentials missing or not working
Cause
A feature requires login but you left App Review Information → Sign-In Information empty, the credentials were wrong/expired, the demo account was on a staging server, or sign-in needs SMS/2FA the reviewer can't receive. One of the most common instant rejections.
Fix — Pro
The step-by-step fix for this entry is part of the full troubleshooting database.