React / Redux: Getting an error of is missing in props validation eslintreact/prop-types

Question

I am getting an issue with my App on certain Lines with the following error:

'Item' is missing in props validationeslintreact/prop-types

From what I have seen, I've installed and Imported the Prop Types via NPM Install and Included an Import at the top of the affected files

The lines in question are "addToCart" and "let itemList = this.props.items.map"

Here is the file in question:

import React, { Component } from 'react';
import { connect } from 'react-redux'
import "materialize-css/dist/css/materialize.min.css";
import { addToCart } from './actions/cartActions'


class Home extends Component{

    handleClick = (id)=>{
      
        this.props.addToCart(id); 
    }


    render(){
    
        let itemList = this.props.items.map(item=>{ //Mapping out the Books on the page
            return(
                <div className="card" key={item.id}>
                        <div className="card-image">
                            <img src={item.img} alt={item.title}/>
                            <span className="card-title">{item.title}</span>
                            <span to="/" className="btn-floating halfway-fab waves-effect waves-light red" onClick={()=>{this.handleClick(item.id)}}><i className="material-icons">+</i></span>
                        </div>

                        <div className="card-content">
                            <p>{item.desc}</p>
                            <p><b>Price: £{item.price}</b></p>
                        </div>
                 </div>

            )
        })

        return(
            <div className="container">
                <h3 className="center">Our Books</h3>
                <div className="box">
                    {itemList}
                </div>
            </div>
        )
    }
}
        
  
//Return this back to App.js to display on the page
const mapStateToProps = (state)=>{
    return {
        items: state.items
         }
    }

    const mapDispatchToProps = (dispatch)=>{
    
        return{            
            addToCart: (id)=>{dispatch(addToCart(id))}
        }
    }

    export default connect(mapStateToProps,mapDispatchToProps)(Home)

I have included the fill repo as well in case its not clear if I am missing anything aswell: https://github.com/scb3/pottercart

Thanks in Advance