Nothing working, got Fatal Error after updating

I click to update everything in the network admin and then I got this:

Fatal error: Cannot redeclare class URI_Template_Parser in /home/jeymi/public_html/wp-content/plugins/wpmu-dev-plusone/lib/external/google/external/URITemplateParser.php on line 30

Nothing works, can´t get in the network admin or nothing, neither through filezilla.

Help, please.