header expression not working on QMC

[#1]

i am having an application where i am using an application for getting the top 1 2 3 companies

but it is reloading on my local machine and getting saved

but when i push it to QMC and run it it getting executed but not distributing it .

=subfield(concat(aggr(COMP, [Territory], Prof_Id,COMP), '|', -aggr(sum($(vMeasure)), [Territory, Prof_Id,MCO)), '|', 1)//=[Top COMP 1]

this is the expression i am using in expression if i wont keep this expression in header and run it it is getting succeeded

can anyone please help me

thanks in advance