أريد إرسال رسالة جماعية لجميع أعضاء منتدى الخاص، لكنني لا أستطيع

[nat (Natalie T)]

Appreciate the error message! There can be two problems here, either

1. one of your trust_level_0 users doesn’t have an email, or
2. sending private messages is not allowed for the receiving user

Are you able to find out?