I am creating customized cells on Swift5 but I get an error.

***Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'could not request a view ofkind:UICollectionElementKindCell with identifier login_cLP-must register a class for the identifier connection' probe into a cell
terminating with uncaught exception of type NSException

import UIKit
import StoreKit

classMenuViewController:UIViewController, UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {

    @IBOutletweak var loginIdView:UICollectionView!
    @IBOutlet weak var expansionView—UICollectionView!
    @IBOutlet weak var recordCalendarView: UICollectionView!
    @IBOutletweak varbannerImage:UIImageView!
    

    override func viewDidLoad(){
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        // Title to navigationItem
        self.navigationItem.title=contract.office
        
        // Initializing a Date Management Class
        cm.cdm_init()

        // Register custom cells in collectionView
        // Get custom cells
        letcLP=UINib(nibName: "Cell_Label_Print", bundle:nil)
        self.loginIdView.register(cLP, forCellWithReuseIdentifier: "login_cLP")
        self.explanationView.register(cLP, forCellWithReuseIdentifier: "explanation_cLP")
        self.recordCalendarView.register(cLP, forCellWithReuseIdentifier: "calendar_cLP")
        
        letcLC=UINib(nibName: "Cell_Label_Command", bundle:nil)
        self.recordCalendarView.register(cLC, forCellWithReuseIdentifier: "calendar_cLC")
        
    hereinafter abbreviated
    }

    functioncollectionView(_collectionView:UICollectionView, cellForItemAtindexPath:IndexPath)->UICollectionViewCell{
//        print("collectionView.tag",collectionView.tag,indexPath,product)
        switch collectionView.tag {
        case menuLoginTag:
            letcell=prepare_Cell_Label_Print(viewType:collectionView,indexPath:indexPath,key:"login_cLP",value:monthlyLoginLabel [indexPath.row],attribute:monthlyLoginIdAttribute [indexPath.row]
    hereinafter abbreviated
        case menuExplanationTag:
            letcell=prepare_Cell_Label_Print(viewType:collectionView,indexPath:indexPath,key:"explanation_cLP",value:explanationMenuLabel [indexPath.row],attribute:explanationMenuAttribute [indexPath.row])

    hereinafter abbreviated

        default://menuCalendarTag

    hereinafter abbreviated

        }
    }
}

import UIKit

class Cell_Label_Print:UICollectionViewCell{

    @IBOutlet weak var BackView: UIView!
    @IBOutlet weak var ForeView: UIView!
    @IBOutlet weak var contents:UILabel!
    
    @IBOutlet peak:NSLayoutConstraint!
    @IBOutlet weak var training:NSLayoutConstraint!
    @IBOutlet weak var leading —NSLayoutConstraint!
    @IBOutlet weak varbottom:NSLayoutConstraint!
    
    override funcawakeFromNib(){
        super.awakeFromNib()
        // initialization code
    }

    override func prepareForReuse(){
        super.prepareForReuse()

        contents.attributedText=nil
    }
}