Can't access Bookings App Items Calendar after Gridbox update 2.18.2

Hallo Guys,

Thank you for the update - functional.

Having an issue now after update that I can't access my booking items and I can't access the calendar.
I am getting the following error message:
Typed static property Balbooa\Component\Gridbox\Site\Helper\BaseHelper::$booking must not be accessed before initialization

Looking forward to hearing from you.

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