How to set due date in Ask for approval action in flow designer

[mickydash2001]

Can anyone suggest how to set due date for ask for approval in flow designer without auto-approve auto-reject or auto-cancel? I tried with adding calculate catalog task due date action but getting one error

class com.glide.glideobject.GlideDateTime cannot be cast to class java.lang.String (com.glide.glideobject.GlideDateTime is in unnamed module of loader com.snc.orbit.container.tomcat8.Tomcat8$OrbitTomcat8ClassLoader @ae40e9; java.lang.String is in module java.base of loader 'bootstrap')

[Sandeep Rajput]

@mickydash2001 Will it be possible for you to share the snapshot of your flow here?

[mickydash2001]

@Sandeep Rajput 

This is the script I wrote 

var gdt = new GlideDateTime();

gdt.addDaysUTC(2);

return gdt;

I tried with this too

var gdt = new GlideDateTime();
var time=gdt.toString();
time=time.split(' ');

gdt.addDaysUTC(2);
var gdt1=new GlideDateTime(gdt.getDate()+' '+time[1]);
return gdt1;

[Sandeep Rajput]

I am not sure about the context of this script however if you would like to get the date value in string then do it as follows.

var gdt = new GlideDateTime();

gdt.addDaysUTC(2);

return gdt.getDisplayValue();

[mickydash2001]

I tried with this not getting any error here but the due date field is showing empty 

 

So the context is I want to set the due date to 2 days from the current date but after 2 days also the approval should show requested it shouldn't auto approve or auto reject. Here is my flow and the error