How to Add Admin Alerts and Error Messages to the Backend of WordPress

I want to report this facebook group. Tried to put it directly as a job through picoworkers but failed.

1. Go to the group > click three dots > click report > click false iinformation > click health > click submit (after get screenshot)> click done

2. The link - https://www.facebook.com/groups/604794840074858/?ref=share