I\'ve been searching for days and trying new and older version of google-api-php-client along with various other examples out there, but I can\'t seem to get around this err
I suffered this error too, in my case the problem was the .p12 file had read permission only for the owner and no access for group and others. I spent 2 days of my life for this...
Now I get the error "User does not have sufficient permissions for this profile" but at least is something new!!