https://parseapi.back4app.com/classes/Estadoscidadesbrasil_City?limit=10&order=name&include=state&keys=name,state,state.name&where=%7B%22name%22%3A%7B%22%24regex%22%3A%22Rio%20%22%7D%7D this is the request that I tried and got Unexpected token < in JSON at position 0

Did you get this error message from the API?