Hi,

I am getting an error : Error: accCont Compile Error: Initial term of field expression must be a concrete SObject: LIST<Branch__c> at line 52 column 21

My Controller is as follows

public with sharing class accCont {
    Public Account acc{get;set;}
    ApexPages.StandardController con;
    public List<Branch__c> branch;
    
     

    public accCont(ApexPages.StandardController controller) {
    con = controller;
    this.acc = (Account) controller.getRecord();
    branch= new List<Branch__c>();
    }
    public pagereference redirect(){    
    con.save();  
    Account a = (Account) con.getRecord();
    a.recordtypeid='012f00000004Jfk';
    a.LastName = a.Last_Name__pc;
        a.FirstName = a.First_Name__pc;
        insert a;
    pagereference ref= new pagereference('/apex/personaccpage');    
    ref.setredirect(true);    
    return ref;            
    }
    public pagereference save(){
        Account a = (Account) con.getRecord();
        a.recordtypeid='012f00000004Jfk';
        a.LastName = a.Last_Name__pc;
        a.FirstName = a.First_Name__pc;
        insert a;
        String id = ApexPages.CurrentPage().getparameters().get('id');
        //return new pagereference('/apex/customerdetail?id='+a.id);
        PageReference acctPage = new PageReference('/apex/customerdetail'+'?id='+a.id);
        acctPage.setRedirect(true);
        return acctPage;
    }
    
     Public pagereference AccView() 
    {
       acc=new Account();
       insert acc;
       PageReference accview =new pagereference('/'+acc.id);
       accview.setRedirect(true);
       return accview;
    }
    
    public void fetchRecords()
    {
        //system.debug('****b.Branch_ID__pc****'+b.BranchName__pc);
        branch= [Select BranchId__c from Branch__c where id=: acc.Branch__pc];
        
        if(acc.size()>0){
                    branch.BranchId__c = acc[0].BranchId__pc;
    

    }
    }
}

 Pleae help me with this. Any help will be appreciated