Are you still running into problems if you try to update now?
The error above means your server didn’t receive a response from ours.
If did not work, You could also follow these steps:
1) Download the plugin from your account page on this site
2) Deactivate and delete the old version of Event Espresso.
3) Upload the new plugin to your site via Dashboard -> Plugins -> Add New.
3.) Activate the plugin.