Two problem with application: not run imputation to field and not run duplication and import ds

Hi,

My first problem (and it is important for us) is not run imputation to field.
My applications is kind of survey. I didn't check Zoho Survey, because I need integration with Zoho CRM and i want send data to my service.
We have one survey but six other way. So I did one general form and seven stateless forms. One form to define way ( one of this: Women age <29,Women age 30-49,Women age >50,Men age <29,Men age 30-49,Men age >50)
Every of this form have ~30 questions. We split every for 5-6 site. Button "Dalej" ("Next") scrolling to next site.

First I had problem how to will do this. But I find way.
I use :
-one field type: Number - it is kind of counter of sites. In load is value = 0
- one field type : Decisionbox. "Next site"
-one Button : "Next"
Process:
In load form, I hide everything question which is in to other site than first. So I see only question to first site. I hide also field :"Number" and "Next site"
When somebody click Button "Next",
input.Next_site = true;
input.counter = (input.counter + 1);

When .Next_site is true :

if ((input.counter = 0) && input.Next_site)
{
    hide K29Q1;
    hide K29Q2;
    show K29Q3;
    show K29Q4;
    show K29Q5;
    show K29Q6;
    show K29Q7;
    input.Next_site = false;
}
if ((input.counter = 1) && input.Next_site)
{
    hide K29Q3;
    hide K29Q4;
    hide K29Q5;
    hide K29Q6;
    //daj inne i cały soft
    hide K29Q7;
    show K29Q8;
    show K29Q9;
    show K29Q10;
    show K29Q11;
    show K29Q12;
    input.Next_site = false;
}
....

Next when counter is more I send to my CRM and send data (I use Post method) to my script which generate survey results.

Everything was good to time. I use every old user interface Zoho creator. Few day ago I want to changed code in this applications, I can only used new interface. When I saved scrip on click button "Next" in form K29 (women age >29) In this form counter and decision box is not changed(not ran). I tested and writed in this action: alert "test"; and alert worked , I saw alert "test". But counter and decision box not changed(for test I show this field in form), so site not scrolling to next site :(
I only saved scrip on click button "Next" in form M30_49 and also not working.

I went to my duplicate application and tested. When I only saved one of form, also not working scrolling. Form which I didn't save in new UI is working and scrolling...

When I want import or duplicate application I can't. Duplicate nothing response, import ds respond error:
Output
Problem encountered while creating the application
null

Please, help me. It is very important for my customers.

Thanks,
Adam