UI action redirection to previous page issue

[KaMmILa__]

we have a UI action Cancel Task on workorder table when clicked it should make the reason for cancellation field mandatory and visible and if entered then it should set the state to cancel, but when I click on the UI action it is redirecting to the previously worked (used page) , not sure how to debug this and it is also not updating the record. 

Below is the UI policy to hide the field 

UI action : 

Script:

function checkReason() {
    g_form.setDisplay("u_cancel_reason", true);
    if (g_form.getValue('u_cancel_reason') == '') {
        g_form.setMandatory("u_cancel_reason", true);
        gs.addErrorMessage("a change task must be added before submitting the change");
        //alert('Please enter the reason before cancellation');
        return false;
    }

    gsftSubmit(null, g_form.getFormElement(), 'cancel'); // give the action name of your UI Action

}

if (typeof window == 'undefined')
    serverResolve();

function serverResolve() {
    new global.StateFlow().processFlow(current, 'ffc7a360d7230100fceaa6859e6103ae', 'manual');
    //Moving redirect from state flow to UI action
    action.setRedirectURL(current);
}

When clicked on the UI action , cancel reason will be mandatory and if selected , there is a OOB in UI action which will enforce worknotes mandatory ,

This is the OOB code 

new global.StateFlow().processFlow(current, 'ffc7a360d7230100fceaa6859e6103ae', 'manual');
//Moving redirect from state flow to UI action
action.setRedirectURL(current);

[Slava Savitsky]

Try adding an info message inside each of those two IF blocks that wrap the current.update() statement to see if the system goes inside those blocks or not.

[KaMmILa__]

I dont see any info message here , please guide me if my syntax is wrong ?

[Slava Savitsky]

My suggestion was to add debug messages in the Script Include, not in the UI Action. In the UI Action you don't need current.update() at all.

[KaMmILa__]

Thanks for that , but as the UI action is not performing the basic update to a field ,that's the reason I am trying in UI action 

[KaMmILa__]

As this is working in My PDI  and not working in Work , after validating the UI action condition , "(new global.StateFlow().validFlow(current, 'ffc7a360d7230100fceaa6859e6103ae', 'manual'));"

When I check the Script include I see some code that it is checking the roles , how do I know what roles I need to have for this  to execute ?