403 error on API.

Hi, i have a minecraft server and i have my own skin system, with my own proxys, hosted on luminati.io the proxys, right now i'm reciving a 403 error on my requests on the api. The problem start like from 1 of march, and i'm getting the 403 error on this endpoint: 

https://api.mojang.com/users/profiles/minecraft/\{name}

EJ: https://api.mojang.com/users/profiles/minecraft/Jojo1545

to get the UUID.