Faild to connect…

Hello,

I got an error message instead of the displaying of grid and inline display :
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While trying to retrieve events, Google returned an error:

Failed to connect to http://www.googleapis.com port 443: Connection refused

Please ensure that both your Google Calendar ID and API Key are valid and that the Google Calendar you want to display is public.

Only you can see this notice.
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I regenerated a new api key, this doesn’t resolved the issue. My calendar is public.

Any idea?
Thanks in advance.

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