I need a help with my unity project

Hello , i have a unity project and its completed only there are few bugs like while generating apk it is showing error .
and there is firebase that is integated but otp is not fetching ..
so there are two task
1. check the error while generating apk
2.firebase otp issue .

https://drive.google.com/drive/folders/16HKLqMs2SeK9lbIPGX_LjVntOvRf0Qb2?usp=sharing
the source code

massage me for admin panel url
public static string baseURL = "http://premji.ludohoney.com/";