Having an issue with the below test class. I have an insert trigger for the sharing object upon a field change. When the field next_step = submit then the code grabs a look up to user on the child, and gives the user visibility to the parent. 

I keep getting an error: 
System.DmlException: Insert failed. First exception on row 0; first error: INSUFFICIENT_ACCESS_ON_CROSS_REFERENCE_ENTITY, insufficient access rights on cross-reference id: []

Class.TestADRShareSubmitV2.ADRNonApprovalObjectUpdateChildRecordwithSubmit: line 136, column 1



@istest
public  class TestADRShareSubmitV2 {

    public static testmethod void ADRNonApprovalObjectUpdateChildRecordwithSubmit()
    { 
       
       
        //buidling the ADR Master Object   
User u =[select id from user where Username = 'bryan.revelant@delmonte.com.saa'];
          ADR__c newadr = new ADR__c();

        newadr.Review__c ='test account';
        newadr.Affiliate_Company__c = 'Test';
        newadr.Apex_Status__c = 'Testing Vendor';
        newadr.Next_Step__c = '';    

        newadr.OwnerId = u.id;
   
           insert newadr;
          
          
         ADR__Share newadrshare3 = new ADR__Share();
       
        newadrshare3.ParentId = newadr.id;
        newadrshare3.AccessLevel = 'Edit';
        newadrshare3.UserOrGroupId = newadr.OwnerId;      
       // newadrshare.UserOrGroupId = NEWADRVOU.User__c;
   
      //  insert newadrshare3; 

           //Building the attachement


      ADR_Non_Approval_Object__c NEWADRNONAO = new ADR_Non_Approval_Object__c();
     //User u =[select id from user where isActive=true limit 1];    
         
        NEWADRNONAO.ADR__c = newadr.id;
        NEWADRNONAO.User__c = u.id;
        NEWADRNONAO.Approval__c = ''; 
        NEWADRNONAO.Approval_Status_Date_Time__c = 'Testing Vendor';
        NEWADRNONAO.CheckReadAccess__c = true;
        NEWADRNONAO.Comments__c = 'Testing cat';
       
        insert NEWADRNONAO;
       
           
     ADR_VIew_Only_Users__c NEWADRVOU = new ADR_VIew_Only_Users__c();
         User ua =[select id from user where isActive=true limit 1];
          NEWADRVOU.User__c = ua.id;
         NEWADRVOU.ADR__c = newadr.id;
        NEWADRVOU.Status__c = '';
      
         insert NEWADRVOU;
       
    newadr.Next_Step__c = 'Submit';
     NEWADRNONAO.Approval__c = 'Submit';
    NEWADRVOU.Status__c = 'Submit';
      try {
            update newadr;
            update NEWADRVOU;
            update NEWADRNONAO;
        } catch (DMLException ex) {
            System.assert(true, 'Please Attach The Required Document Below In Notes and Attachment Section.');
        }
   

         ADR__Share newadrshare1 = new ADR__Share();
       
        newadrshare1.ParentId = NEWADRNONAO.ADR__c;
        newadrshare1.AccessLevel = 'Edit';
        //newadrshare.UserOrGroupId = u.id;      
        newadrshare1.UserOrGroupId = NEWADRVOU.User__c;
       
       
       
      insert newadrshare1;
  
             list<ADR__Share> Results = new list<ADR__Share>
        ([SELECT ParentId, AccessLevel, UserOrGroupId FROM ADR__Share]);
system.assert(Results.size()>0, 'No Answes found: '+ Results);
         } 
    }