Fatal error upon logging in to dashboard

I logged into my wordpress site (www.celebrateyourpath.com) this morning to make a couple of quick changes to one page, and update plugins. Right after doing so, every time I try to log in to my site’s dashboard, all I see is the following on the webpage. I can not access my dashboard, my profile, nothing. The website itself is still up, so it doesn’t appear to be a problem with the hosting service (DreamHost). I am not savvy with web design at all, so I have no idea what is going on or what to do to fix it. Here is the message I’m getting:

Warning: require_once(WPSEO_PREMIUM_PATHclasses/google/Google_Client.php) [function.require-once]: failed to open stream: No such file or directory in /home/ambdie/CelebrateYourPath.com/wp-content/plugins/google-analytics-for-wordpress/admin/api-libs/googleanalytics/class-google-analytics-client.php on line 4

Fatal error: require_once() [function.require]: Failed opening required ‘WPSEO_PREMIUM_PATHclasses/google/Google_Client.php’ (include_path=’.:/usr/local/lib/php:/usr/local/php5/lib/pear’) in /home/ambdie/CelebrateYourPath.com/wp-content/plugins/google-analytics-for-wordpress/admin/api-libs/googleanalytics/class-google-analytics-client.php on line 4

Can anyone help? Please remember I’m just a beginner at websites, so I really need detailed instructions and help. Thank you.