404 Error

@daredevil73 Could you try to log in to your site via FTP, delete the existing Jetpack plugin folder, and reinstall the plugin manually as explained here:
http://codex.ww.wp.xz.cn/Managing_Plugins#Manual_Plugin_Installation

@daredevil73 In this case, you’ll need to wait until the next version of Jetpack is released. We plan on releasing Jetpack 3.3 next week.