TextInput doesn't filter FlatList items

I'm using Typescript, form some reason the function below gives me the error: Property 'title' doesn't exist on type 'never'. If i write the same function in JS it doesn't give me error, only in Typescript. I don't know why, but my TextInput doens't filter the FlatList items.

    const searchFilter =(text) => {        if(text){            const newData = masterData.filter((item) => {                //the error appears in the next line below in 'item.title'                const itemData = item.title ? item.title.toUpperCase() : ''.toUpperCase();                 const textData = text.toUpperCase();                return itemData.indexOf(textData) > -1;            });            setFilteredData(newData);            setSearch(text);        } else {            setFilteredData(masterData);            setSearch(text);        }    }

My FlatList works and show the data from the JSON fetch. The only problem is when i start typing in the TextInput and the FlatList disappears.

Full code below:

const ManageCustomersScreen =(props: ManageCustomersScreen) =>{    //navigation    const backPage = () => props.navigation.navigate("Home");    const callCustomer = () => props.navigation.navigate("Customer");    const [filteredData, setFilteredData] = useState([]);    const [masterData, setMasterData] = useState([]);    const [search, setSearch] = useState('');    useEffect(() => {        fetchPosts();        return() => {        }    }, [])    const fetchPosts = () => {        const apiUrl = 'https://jsonplaceholder.typicode.com/users';        fetch(apiUrl)        .then((response) => response.json())        .then((responseJson) => {            setFilteredData(responseJson);            setMasterData(responseJson);        }).catch((error) => {            console.error(error);        })    }    const ItemView = ({item}) => {        return(<View style={manageCustomersStyle.tableBody}><View style={manageCustomersStyle.customerCard}><TouchableOpacity                style={manageCustomersStyle.customerCardContent}                onPress={callCustomer}><View style={manageCustomersStyle.customerCardInfo}><Text style={manageCustomersStyle.customerCardInfoName}>{item.name}</Text><Text style={manageCustomersStyle.customerCardInfoId}>{item.id}</Text></View><Icon                        name="angle-double-right"                        size={40}                        color="grey"                    /></TouchableOpacity></View></View>        )    }    const searchFilter =(text) => {        if(text){            const newData = masterData.filter((item) => {                const itemData = item.title ? item.title.toUpperCase() : ''.toUpperCase();                const textData = text.toUpperCase();                return itemData.indexOf(textData) > -1;            });            setFilteredData(newData);            setSearch(text);        } else {            setFilteredData(masterData);            setSearch(text);        }    }    return(<SafeAreaView style={manageCustomersStyle.safeAreaView}><Appbar.Header><Appbar.BackAction onPress={backPage} /><Appbar.Content title ="Manage Customers" />         </Appbar.Header><View style={manageCustomersStyle.searchBarView}><Icon                 name="search"                size={30}                color="grey"                style={manageCustomersStyle.searchBarIcon}/><TextInput                style={manageCustomersStyle.searchBar}                placeholder={'Search'}                value={search}                onChangeText={(text) => searchFilter(text)}/></View><FlatList                 data={filteredData}                keyExtractor={(item, index) => index.toString()}                renderItem={ItemView}            /></SafeAreaView>    );}export default ManageCustomersScreen;

These screenshots shows when i start typing in the TextInput the FlatList simply disappears.