I am get the message similar to this “Error during adding new booking resource into DB” – “wp_bookingtypes doesnt exist “. What is wrong ?

This error is appear because of wrong installation of plugin.
1) Please, open the General Booking Settings page and set this option “Delete booking data during uninstall”, as unchecked, at the right side of page, otherwise your exist booking data will be delete during deactivation of plugin.
2) Then open the Plugins menu and press Deactivate link of Booking Calendar. Wait, for the message about: “plugin is deactivated successfully”.
3) Then press activate link. Wait, until message will show up that plugin is activated successfully.
Now, you can test it again.