Undefined property: $browser, $platform, $ismobiledevice

I'm getting this errors when I want to show the login activity of a user:

Notice: Undefined property: stdClass::$browser in login_activity_view_user_activity() (line 61 of /home/mydomain/domains/mydomain.be/public_html/staging/sites/all/modules/login_activity/login_activity.pages.inc).

Notice: Undefined property: stdClass::$platform in login_activity_view_user_activity() (line 62 of /home/mydomain/domains/mydomain.be/public_html/staging/sites/all/modules/login_activity/login_activity.pages.inc).

Notice: Undefined property: stdClass::$ismobiledevice in login_activity_view_user_activity() (line 63 of /home/mydomain/domains/mydomain.be/public_html/staging/sites/all/modules/login_activity/login_activity.pages.inc).

I first had an error in my status report : Browscap data / browscap.ini is not configured in php.ini.

Then I downloaded the module Browscap and now he shows that the Browscap module is installed and no errors given.
But I'm still getting the three above errors and Browser, Platform are not filled in , in my table.