SimpleCalendar\plugin_deps\GuzzleHttp\Exception\RequestException thrown

cURL error 60: SSL certificate problem: unable to get local issuer certificate (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://www.googleapis.com/calendar/v3/calendars/6v6aud2d0ibvdqgjo6gi67otqo%40group.calendar.google.com/events?singleEvents=true&maxResults=2500&timeZone=Europe%2FBerlin&timeMin=2021-08-21T00%3A00%3A00%2B02%3A00&timeMax=2022-09-19T23%3A59%3A59%2B02%3A00&orderBy=startTime&key=AIzaSyDz__my67EeY6OmTr0eGrzaL2HEDnpiqUM