Perfectly looking workflow always raises an exception

Hi! I hope someone can help me.

Here is my workflow:

const entities = require('@jetbrains/youtrack-scripting-api/entities');
const workflow = require('@jetbrains/youtrack-scripting-api/workflow');

exports.rule = entities.Issue.onChange({
 title: 'State-change-restriction-to-noneexecutive-members',
 guard: (ctx) => {
   // Check if the issue state is being changed.
   return ctx.issue.fields.isChanged(ctx.State);
 },
 action: function (ctx) {
   const issue = ctx.issue;
   const currentUser = ctx.user; // Assuming project leader can fetch current user information

   // workflow.message('step 1');
   
   // workflow.message( currentUser.login );
   
   // workflow.message( issue.project.name );
   
   // Check if the current user is the assignee and has the 'Non-executive team member' role.
   if( currentUser.hasRole('Non-executive team member', issue.project) )
   {
       // workflow.message('step 2');
     
       if ( issue.fields.Assignee.login != currentUser.login ) 
       {
           workflow.message('Only the assignee with the "Non-executive team member" role can change the state.');
           issue.fields.State = issue.fields.oldValue(ctx.State);
       }
   }
 },
 requirements: {
   // Define the custom field for issue state if it's not predefined
   State: {
     type: entities.State.fieldType,
     name: 'State' // Replace 'State' with the actual name of your state field.
   },
   Assignee: {
     type: entities.User.fieldType,
     name: 'Assignee' // Ensure 'Assignee' matches the name of your assignee field.
   }
 }
});

Every time it is activated it shows this message: “Couldn't update issue field. The state-change-restriction-to-noneexecutive-members/state-change-restriction-to-noneexecutive-members rule threw an exception when processing the following issue: 2-178”

But

-The role 'Non-executive team member' exists.

-The workflow is intended to allow state change only for the user who assigned to the issue if he/she has the role ‘Non-executive team member’, otherwise it does nothing.

So I don't know what the problem is.