Even if the Handler doesn’t prompt, go to Settings > Apps > Facebook > Permissions and grant Storage, Contacts, Camera, Location. Over-granting is safer on API 23 than under-granting for stability.
If you want, I can:
Navigate to Settings > Battery > Battery optimization. Find Facebook, select "Don’t optimize." This prevents Doze from throttling the Handler. Facebook Handler Apk Android 23
Surprisingly, the handler requires the "Phone" permission to read your device's unique ID for security verification. Even if the Handler doesn’t prompt, go to
If you need a lightweight solution for an old Android 23 device, consider using Facebook Lite or the mobile web version—both avoid many handler-related bugs on older OS versions. Even if the Handler doesn’t prompt