title: (403) Access Not Configured when adding event to calendar
body: <p>Today I started to get this error upon adding new events to calendar: </p>
  
  <pre><code>Fatal error: Uncaught exception 'apiServiceException' with message
   'Error calling POST https://www.googleapis.com/calendar/v3/
  calendars/[cal-id]@group.calendar.google.com/events?alt=json&amp;key=[dev-key]:
   (403) Access Not Configured' in /[...]/src/io/apiREST.php:86
   Stack trace: #0 /[...]/src/io/apiREST.php(56): apiREST::decodeHttpResponse(Object(apiHttpRequest)) 
   #1 /[...]/src/service/apiServiceResource.php(148): apiREST::execute(Object(apiServiceRequest)) #2 /[...]/src/contrib/apiCalendarService.php(472): 
  apiServiceResource-&gt;__call('insert', Array) #3 /[...]/index.php(160): EventsServiceResource-&gt;insert('[cal-id-part]...', 
  Object(Ev in /[...]/src/io/apiREST.php on line 86
  </code></pre>
  
  <p>It worked perfectly till now and I didn't change anything in code.</p>