[Freeswitch-users] hiredis: realm must be defined

Hi, all Can anybody clarify what mean 'hiredis: realm must be defined'? Where is the misconfiguration? I am trying to use hiredis backend for limits and call api like 'api limit_usage hiredis myrealm id', got api/response '-1' and FreeSWITCH says in log 'hiredis: realm must be defined'. Module mod_hiredis loaded and exists. For hash backend works fine.