"Sandbox User"

I absolutely loved this app, I dont usually spend money on apps but for this one I bought everything there is to buy and I dont regret it. What I dont like is now when I try to log in it says "you are not a sandbox user of this client" and I cant log in. This is so upsetting

Dmc1991 about Followers Mania for Instagram - follow management tool with statistic about likes and comments for true IG, v1.2.2