React Native (Android) app stuck on loading after logging into browser and running okay on iOS

[s.m.minert]

when I first time click login button it ask me for login info for Fitbit then after I press login it keep showing loading icons instead of returning me access token . 

this is the function i am using 

function OAuth(client_id, cb) {

Linking.addEventListener("url", handleUrl);

function handleUrl(event) {

Linking.removeEventListener("url", handleUrl);

const [, query_string] = event.url.match(/\#(.*)/);

const query = qs.parse(query_string);

cb(query.access_token);

}

const oauthurl = `https://www.fitbit.com/oauth2/authorize?${qs.stringify({

client_id,

response_type: "token",

scope: "heartrate activity activity profile sleep",

redirect_uri: "fitbit://fit",

expires_in: "31536000",

})}`;

Linking.openURL(oauthurl).catch((err) =>

console.error("Error processing linking", err)

);

}
Please get back as soon as possible , thanks in advance 

[GordonFitbit]

This is a duplicate to https://community.fitbit.com/t5/Web-API-Development/Android-app-stuck-on-loading-after-logging-into-....