Hi everyone tried below trigger which is working fine but testclass failed,can someone help me out.

Trigger:
//when opportunity is inserted opportunityLineItem with one product associated should insert
trigger Insertingoppandoppline on Opportunity (after insert) {
 Pricebook2  standardPb = [select id, name, isActive from Pricebook2 where  IsStandard = true limit 1];
    
    Product2 prd1 = new Product2 (); // ----> Create  product
    prd1.Name='myproduct';
    insert prd1;
    
    PricebookEntry pbe1 = new PricebookEntry ();  //------->Create PriceBookEntry
    pbe1.Product2ID=prd1.id;
    pbe1.Pricebook2ID=standardPb.id;
    pbe1.UnitPrice=50;
    pbe1.isActive=true;
    insert pbe1;
    
    List<OpportunityLineItem>  oplist=new List<OpportunityLineItem>(); //-->Create List to store OpportunityLineItem
    
    for(Opportunity opp: Trigger.New)
    {
        OpportunityLineItem oppli = new OpportunityLineItem(); //---->Create OpportunityLineItem.
        oppli.PricebookEntryId=pbe1.Id;
        oppli.OpportunityId = opp.Id;
        oppli.Quantity = 5;
        oppli.TotalPrice = 10.0;
       oplist.add(oppli);
    } 
    insert oplist; //----->insert OpportunityLineItem
}
testclass:
@isTest
public class Testinsertoppandoppline {
@isTest
    static void invoke(){
       PricebookEntry PBE=[select id from PricebookEntry limit 1 ];
Opportunity opp= new Opportunity();
opp.name='testOpp';
opp.closeDate=system.today()+20;
opp.stageName='Qualification';
try{
insert opp;
}
catch(Exception e){
System.debug(e);
}

List<opportunitylineitem> opppro = new opportunitylineitem[]{new opportunitylineitem(UnitPrice=10000.00, Quantity=10, opportunityid=opp.id, pricebookEntryId=PBE.id),new opportunitylineitem(UnitPrice=10000.00,     Quantity=10,  opportunityid=opp.id, pricebookEntryId=PBE.id),new opportunitylineitem(UnitPrice=10000.00,     Quantity=10,  opportunityid=opp.id, pricebookEntryId=PBE.id),new opportunitylineitem(UnitPrice=10000.00,     Quantity=10,  pricebookEntryId=PBE.id, opportunityid=opp.id)};
insert opppro;

    }
}