I have been trying to set it up since two months, but every time I solve one 
problem, I get into another one.

I am running Arch linux with latest Nginx. 

When I login in into BPC web interface, I get

Error: Unable to read config.pl or language strings!!

Note: $ENV{REMOTE_USER} is not set, which could mean there is an 
installation problem. BackupPC_Admin expects Apache to authenticate the user 
and pass their user name into this script as the REMOTE_USER environment 
variable. See the documentation. 
The only solutions I found online were related to Apache, so useless to me.

Can anyone help me here?

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