uploadToAnonymousFilesAsync returns 522 error for web

I just started learning expo by it’s get started tutorial and got stuck at handling platform differences. I am trying to use 'anonymous-files' by calling uploadToAnonymousFilesAsync as in docs

let remoteUri = await uploadToAnonymousFilesAsync(pickerResult.uri);

but keep getting 522 error.

Unhandled Rejection (TypeError): Failed to fetch

I assume that the problem is in my side, but even if I copy the code from there repo I still get this error. Any ideas what can be the reason ? Here is the hole code

import React from 'react';
import { Image, Platform, StyleSheet, Text, TouchableOpacity, View } from 'react-native';
import * as ImagePicker from 'expo-image-picker';
import * as Sharing from 'expo-sharing';
import uploadToAnonymousFilesAsync from 'anonymous-files';

export default function App() {
  let [selectedImage, setSelectedImage] = React.useState(null);

  let openImagePickerAsync = async () => {
    let permissionResult = await ImagePicker.requestMediaLibraryPermissionsAsync();

    if (permissionResult.granted === false) {
      alert('Permission to access camera roll is required!');
      return;
    }

    let pickerResult = await ImagePicker.launchImageLibraryAsync();
    if (pickerResult.cancelled === true) {
      return;
    }

    if (Platform.OS === 'web') {
        let remoteUri = await uploadToAnonymousFilesAsync(pickerResult.uri);
      }
      setSelectedImage({ localUri: pickerResult.uri, remoteUri });
    } else {
      setSelectedImage({ localUri: pickerResult.uri, remoteUri: null });
      }
  };

  let openShareDialogAsync = async () => {
    if (!(await Sharing.isAvailableAsync())) {
      alert(`The image is available for sharing at: ${selectedImage.remoteUri}`);
      return;
    }

    Sharing.shareAsync(selectedImage.remoteUri || selectedImage.localUri);
  };

  if (selectedImage !== null) {
    return (
      <View style={styles.container}>
        <Image source={{ uri: selectedImage.localUri }} style={styles.thumbnail} />
        <TouchableOpacity onPress={openShareDialogAsync} style={styles.button}>
          <Text style={styles.buttonText}>Share this photo</Text>
        </TouchableOpacity>
      </View>
    );
  }

  return (
    <View style={styles.container}>
      <Image source={{ uri: 'https://i.imgur.com/TkIrScD.png' }} style={styles.logo} />
      <Text style={styles.instructions}>
        To share a photo from your phone with a friend, just press the button below!
      </Text>

      <TouchableOpacity onPress={openImagePickerAsync} style={styles.button}>
        <Text style={styles.buttonText}>Pick a photo</Text>
      </TouchableOpacity>
    </View>
  );
}

const styles = StyleSheet.create({...});

It seems to me that it’s cors error, should I create server to serve this app and change cors settings for using 'anonymous-files' library ?