“No Query String Present” for Qlik based queries

Dear Team,

I have successfully crated the connection string with Monday.com from Qlik rest connector .

In POST request I am passing below query, which is working fine in Monday API developer

{query{
boards {
items{
id
name
}
}
}}

BUT when I hit monday.com API from Qlik , I am receiving error message as’
“No Query String Present”’