Time syncs 1 hour later to Google Calendar

Hi there,

When I make an appointment with Appointment+ at (for example) for april 22th 8AM, it syncs to Google Calendar as april 22th 9AM (1 hour later then it should). This messes up my clients scheduele. His timezone is GMT +1 (Amsterdam). The e-mail people receive from Appointment+ shows the correct time. It's just the syncing to Google Calendar that has a bug.

I've already checked this:

– Server time (I'm the webhost and I've checked the server myself) is set on GMT +1 and displays the correct time

-Google Calendar setting is set on GMT +1 and displays the correct time (see screenshot)

-Wordpress time setting is set on GMT +1 and displays the correct time

Please let me know what's wrong and how to fix it asap.

If you need it, I've granted Support Staff Access to the site with the setting in the WPMU DEV dashboard.

Thanks!

Kind regards,

Steven