Connection timeout after changing hosts

I have an issue with the GCal Plugin after moving to annother host.

On the development site, it all works fine.
You can find it here: http://dieerste-kompanie.kochsiek.org/blog/

On the live site, i get an error when loading the widget “connect() timed out! Please ensure your calendar ID is correct.”
You can find it here: http://www.dieerste-kompanie.de/blog/

The calendar ID is correct. The two sites are exact copies.

– Check that you’ve updated to the most current version of the plugin.
Wordpress 4.22
Google Calendar Events 2.2.5

– Review your individual GCal feed settings (and widget settings if used).
Nothing seems to be wrong here.

– Make sure your calendar ID is in the correct format.
It is.

– Make sure your calendar is set to public.
It is.

– Manually clear feed feed caches using links found in the settings.
Already did this.

– Test for theme and plugin conflicts.
No conflicts to be found.

– Review our documentation including the general questions.
Checked that.

Does your issue still exist? Feel free to submit a post in these forums, but please include the following:

– Details, details. The more the better.
Here we go.

– Share your calendar ID and the public link for it.
https://www.google.com/calendar/embed?src=q6mlbaq9emrus42pjga40tkndg%40group.calendar.google.com&ctz=Europe/Berlin
http://www.dieerste-kompanie.de/gce_feed/kalendar/

– Is your issue happening using a shortcode, widget or both?
Widget.

– Did your issue happen upon a fresh install of the plugin or an upgrade from a previous version (and which one)?
Fresh install.

– Take a screenshot of your feed and/or widget settings and link to it using a screen sharing service like Dropbox, Cloudup, or Jing/Screencast.
http://dieerste-kompanie.kochsiek.org/gcal_settings.jpg

– Paste in the shortcode and event builder content you’re using.
I got nothing.

– It’s extremely helpful if you can put up a test page (or multiple pages) and link the issue you’re having so we can take a look.
Working here: http://dieerste-kompanie.kochsiek.org/blog/
Not working here: http://www.dieerste-kompanie.de/blog/

– Let us know if you’ve already tested for theme and plugin conflicts.
As it’s working on the development site, i don’t think there are any conflicts.

– Please don’t respond to a resolved topic. We’ll miss it. Start a new post or respond in an existing unresolved topic.
Just started a new one 🙂

https://wordpress.org/plugins/google-calendar-events/