Hi im getting this visualforce error in production that says "Argument 1 cannot be null". but it is not specifying where the error is happening. here is the constructor for the controller being used in this page.

 public myAucions(){
    {
        SHOW_SUMMARY_TABLE = false;
        SHOW_LISTING_TABLE = true;
        SHOW_SUMMARY_DETAIL = false;
        SHOW_SUCCESS_MSG = false;   
        SHOW_COMMIT_BUTTON = false;
        
       
            
        try
        {
           // this.category= (ServoTerraCategory__c) controller.getRecord(); 
            Profile vProfile = [Select p.Id, p.Name from Profile p where p.Id=:UserInfo.getProfileId()];
            if(vProfile!=null && vProfile.name.startsWith('Public'))
            {
                showHeader='false';
                siteTemplate='SiteTemplate';
            }
            else
            {
                showHeader='true';
                siteTemplate='PortalTemplate';
            }
            
            
         }
          catch(exception e){
          	
          }
          
         
       
        if(ApexPages.currentPage().getParameters().get('assetid') != null)
        {
            AssetId = ApexPages.currentPage().getParameters().get('assetid');
            makeOfferBtnActn();
        }
       
      
    }//end of constructor

public class InnerClassForOfferVals
    {
        public auction__c objAuctn {get;set;}
        public Double offerAmt {get;set;}
        public Double totalAmt {get;set;}
        public String buyerComments {get;set;}
        public InnerClassForOfferVals(){}
    }
    
    public List<InnerClassForOfferVals> lstSummaryAuction {get; set;}
    
    public void makeOfferBtnActn()
    {
        lstSummaryAuction = new List<InnerClassForOfferVals>();
        if(AssetId == null)
        {    
            try{  
            for(Integer i=0; i<pager.pages.size(); i++)
            {
                List<AuctionRecord> lstTempAuctnRec = pager.pages.get(i);
                for(AuctionRecord objAR : lstTempAuctnRec)
                {
                    if(objAR.isCheck)
                    {
                        InnerClassForOfferVals objInner = new InnerClassForOfferVals();
                        objInner.offerAmt = 0;
                        objInner.totalAmt = 0;
                        objInner.objAuctn = objAR.objAuction;
                        lstSummaryAuction.add(objInner);
                    }
                }
                
               
            }
            
            }
            catch (Exception e) {
            
            }
        }
        else
        {
            String vQuery= 'Select a.OwnerId,a.asset__c, a.Available_Date__c, a.Description__c, a.Terms__C, ' +
                                   'a.end_Date__c, a.Id, a.Location__c, a.Location__r.city__c, a.Location__r.country__c, '+
                                   'a.Location__r.state_Province__c, a.Manufacturer__c, a.Model_No__c, a.Name, a.QtyAvail__c, '+
                                   'a.Servo_Terra_Category__c, a.Servo_Terra_Category__r.Id, a.Servo_Terra_Category__r.Name, a.SRP__c, '+
                                   'a.start_Date__c from auction__c a where Id =: AssetId';
            auctionList =  Database.query(vQuery);
          
            
            InnerClassForOfferVals objInner = new InnerClassForOfferVals();
            objInner.offerAmt = 0;
            objInner.totalAmt = 0;
            objInner.objAuctn = auctionList[0];
            lstSummaryAuction.add(objInner);
        }
        if(!lstSummaryAuction.isEmpty())
        {
            SHOW_SUMMARY_TABLE = true;
            SHOW_LISTING_TABLE = false;
        }
       
    }