Make/Integromat doubt

I need to automate a process with Make and I have a problem. I have created a Yes/No field and from Make I´m able to modify it.

In this field I have written a code in Trigger after the change like this:

if Yes then

    let mySlides := (select 'Slides V2' where 'End Date' < today() and 'Billing Status' = 1);

    for i in my Slides do

        let myName := i.Labs.'Laboratory name' + "-" + i.'Proforma number';

        i.(Image := importFile(i, printAndSaveRecord(i, "Proforma"), myName + ".pdf"))

    end

end

This action works perfectly if I make the modification manually but not when it is done by Make.

If I include more instructions such as creating records and filling them in, it also does it, but not the part of printing and saving a template.

What I can do?