Hi there,
Currently stuck with the same issue, events are created in the dashboard but not showing up unless manually edited and saved… I don’t know what to do: either revert to TEC 5.X or waiting for a solution for this?
On a side note I also tested the add-on plugin but can’t even import anymore (using wp all import) with a message error:
[] TEC –?THE EVENTS CALENDAR EXTENSION: WPAI ADD-ON:
[] TEC – Not supported post type. Skipping.