The calendar object needs to be exposed with "write" properties in order to allow users to hide/show the corresponding calendar in the calendar app. It doesn't has any affects on the general permissions for the whole board or the tasks. As soon as you select a task you jump to the deck app where the normal deck permissions are applied.
fixes: https://github.com/nextcloud/deck/issues/4618
Signed-off-by: Björn Schießle <bjoern@nextcloud.com>
Björn Schießleandbackportbot-nextcloud[bot]