React-native-auth0 saveCredentials error - Cannot read property 'hasValidAuth0Instance' of null

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1

I have a React Native v0.75.4 application built with the React Native CLI where I’m implementing the passwordRealm login method then saving credentials using the credentialsManager.

The passwordRealm call is successful and returns a credentials object, but when trying to save it using the credentialsManager saveCredentials method, it throws the following error:

[a0.credential_manager.invalid: Cannot read property 'hasValidAuth0Instance' of null]

The version of the react-native-auth0 SDK in package.json is:
"react-native-auth0": "^3.2.1"

The code in my application is below:

import Auth0 from 'react-native-auth0';

const auth0 = new Auth0({
  domain: DOMAIN,     // uses real value
  clientId: CLIENT_ID,  // uses real value
});

export const login = async (username: string, password: string) => {
  try {
    const credentials = await auth0.auth.passwordRealm({
      username,
      password,
      realm: config.realm,
      scope: config.scope,
    });
    await auth0.credentialsManager.saveCredentials(credentials);  <- error
  } catch (err) {
    console.log(err);
  }
};