Error Code: 1242. Subquery Returns more than 1 Row (but makes no sense)

Question

I need to know the registration number of a table grouped by method, and I also need to have the registration number of positives by positive methods, all this per user. I did something similar in another table worked but not in this one. (I am using mysql)

SELECT 
  busines.method_id, 
  m.name Metodo, 
  count(busines.id) Nro_busines, 
  ifnull(
    (
      select 
        (
          count(b.profit) nro_lucros 
          from 
            busines b 
            join busines on b.id = busines.id 
            and b.method_id = busines.method_id 
            and b.user_id = busines.user_id 
          where 
            b.user_id = "1598521" 
            and b.profit >= 0 
          group by 
            b.method_id
        ), 
        0
    ) as nro_lucros 
    FROM 
      busines 
      join methods m on m.id = busines.method_id 
      and m.user_id = busines.user_id 
    where 
      busines.user_id = "1598521" 
    group by 
      busines.method_id

Error Code: 1242. Subquery Returns more than 1 Row

Table key busines only id Key of ways only id