These are my findings for those who are still facing issues.
This is what I did to have the site working
Step 1.
I downloaded Version 2.0.2 and uploaded it on live server and extracted files from File.zip to a root folder
Step 2.
I installed it using random Key and installation went smoothly
Step 3.
I then downloaded Version 2.0.3 and uploaded it on same live server, Extracted files from File.zip and replaced the files I extracted on Step 1
Step 4.
I edited the .env file with my database name, username and password details
Step 5.
All was running smoothly even registration went smoothly until I wanted to login on user Dashboard then boom the was an ERROR (504 Error)
Step 6 .
I uploaded the Addon CryptoTrading and the error was resolved and there I was on Dashboard
Step 7
I visited profile (Account Setting) and there was an error again (504 Error), I uploaded KYC addon since I realised it's related to profile, then the error was fixed.
Sooooooo far the only issue I am still figuring out is the referral link because it's not there.