Expo cannot load fonts

Question

I've been trying to load fonts in Expo, but I keep getting the same error.

This is my code:

My Index.js looks like this:

import WelcomePage from "./Authentication/WelcomePage";

export default function Page() {

  return (
      <WelcomePage/>
  );
}

And my Welcomepage looks like this:

import {Link, useRouter} from "expo-router";
import {windowForm} from "../Design/WindowForm";
import {Button} from "react-native-paper";
import Styles from "../Design/styles";
import Constants from "expo-constants";
import {Inter_900Black, useFonts} from "@expo-google-fonts/inter";

const WelcomePage = () => {
    const router = useRouter()
    let [fontsLoaded] = useFonts({
        Inter_900Black,
    });

    if (!fontsLoaded) {
        return null;
    }
    return(
        <View style={{width: windowForm().at(0), height:windowForm().at(1)}}>
            <Text style={{fontFamily:'Inter_900Black'}}>
                Hey
            </Text>
        </View>
    )
}
export default WelcomePage

This is the error I keep getting:

Warning: React has detected that the order of Hooks calls in WelcomePage has changed. If not fixed, this will lead to errors and bugs. For more information, read the Rules of Hooks: https://reactjs.org/link/rules-of-hooks

Includes the following:

Previous rendering

1. useState
2. useState
3. useEffect
4. undefined

Next rendering

1. useState
2. useState
3. useEffect
4. useState

Answer 1

Thanks to Mike 'Pomax' Kamermans

I've figured out I should do an MCVE first. This way I realized that the problem was not with the font, but with my javascript windowForm().at(0) being called in the same const.

I'm not sure why yet, but when I separate them, there are no errors. I'll edit this post once I know more. Hats off to Mike.