Invariant Violation: Native Module cannot be Null. Error only showing up on iOS

Background I've been developing a React Native app managed by Expo for almost a year now, but was unable to test it on iOS given I didn't have neither a Mac nor an iPhone at my disposal back then. I managed to buy an iPhone 8 and today I tried running the app on it to no result.

Problem I get an Invariant violation: Native module cannot be null when trying to run the app. The error stack reads as follows in VS Code:

Invariant Violation: Native module cannot be null.
- node_modules\react-native\Libraries\LogBox\LogBox.js:148:8 in registerError
- node_modules\react-native\Libraries\LogBox\LogBox.js:59:8 in errorImpl
- node_modules\react-native\Libraries\LogBox\LogBox.js:33:4 in console.error
- node_modules\expo\build\environment\react-native-logs.fx.js:27:4 in error
- node_modules\react-native\Libraries\Core\ExceptionsManager.js:104:6 in reportException
- node_modules\react-native\Libraries\Core\ExceptionsManager.js:171:19 in handleException
- node_modules\react-native\Libraries\Core\setUpErrorHandling.js:24:6 in handleError
- node_modules\expo-error-recovery\build\ErrorRecovery.fx.js:9:32 in ErrorUtils.setGlobalHandler$argument_0
- node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
- node_modules\regenerator-runtime\runtime.js:293:29 in invoke
- node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
- node_modules\regenerator-runtime\runtime.js:154:27 in invoke
- node_modules\regenerator-runtime\runtime.js:164:18 in PromiseImpl.resolve.then$argument_0
- node_modules\react-native\node_modules\promise\setimmediate\core.js:37:13 in tryCallOne
- node_modules\react-native\node_modules\promise\setimmediate\core.js:123:24 in setImmediate$argument_0
- node_modules\react-native\Libraries\Core\Timers\JSTimers.js:130:14 in _callTimer
- node_modules\react-native\Libraries\Core\Timers\JSTimers.js:181:14 in _callImmediatesPass
- node_modules\react-native\Libraries\Core\Timers\JSTimers.js:441:30 in callImmediates
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:387:6 in __callImmediates
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:135:6 in __guard$argument_0
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:364:10 in __guard
- node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:134:4 in flushedQueue
* [native code]:null in flushedQueue
* [native code]:null in invokeCallbackAndReturnFlushedQueue

And these screenshots show what I get on my phone:

If I try and follow the links to the screens I've coded, not the random node_modules dependencies I land at these snippets of code:

1. Filters

                   <View style={styles.check}>
                        <Text style={styles.propName}>Happy hour</Text>
                    <CheckBox
                        value={selectedExtra ? true : extra3}
                        onValueChange={() => setExtra3(!extra3)}
                        tintColors={tintColors}
                        />
                    </View>
   

2. Profile Screen

        <TouchableOpacity style={styles.listItem} onPress={() => navigation.navigate('yourPurchases')}>
            <Text style={styles.listText}>Your orders</Text>
            <View style={styles.greyArrow}>
              <GreyArrow />
            </View>
          </TouchableOpacity>

(Grey Arrow and Stylesheet imports are just fine. Navigation and everything else works perfectly on Android).

What I've tried

The application runs perfectly on Android, running into 0 issues. I've tried npx react-native link, uninstalling and reinstalling all dependencies, building and running first on Android and then on iOS. As this is an expo managed app, as far as I know I can't use the "cd /ios --> pod install" method.

Question

How can I get the app to run on iOS and what is generating the crashes?

Thanks a whole lot in advance!

from Invariant Violation: Native Module cannot be Null. Error only showing up on iOS