Install efq_views causes HTTP Error 500 (Internal Server Error)

Hi. the site goes offline when I try to install efq_views module.

this is the error message that the sysadmin has found:

error: Unsupported operand types in
/home/falconfi/public_html/sites/all/modules/efq_views/efq_views.views.inc
on line 20
(I can not understand the issue in line 20.)

this is the error message in my browser (Chrome): is HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request.

I have disabled the module in system table on database, and removed the files. the site now is online.

I need this module for use relation_select module. any suggestion will be apreciated.

thanks.