I cannot access File Manager

I cannot access my File Manager. While Click on “Upload Files” in my File Manager menu, it redirects me to https://in.000webhost.com/members/website/{my_website}/ftp-redirect and then it shows:

This site can’t be reached
files.000webhost’s server IP address could not be found.

Have i lost all my data? Any help will be much appriciated.

No your data is safe, it appears there are some network issues.
Try using a proxy or a VPN like Windscribe Free.
Or alternative DNS in the meantime till it subsides