WordPress Menu not adding Events Item

I can add Page onto my menu under Appearance – Menus. But I can not add Events Items to my menu? I have read almost every single article about I could get hold of.
I have changed the url from https://www.thctest.co.za to https://www.vascumed.co.za as for it’s built for a client that already owns https://www.vascumed.co.za/

• This topic was modified 7 years, 5 months ago by christiaan59.
• This topic was modified 7 years, 5 months ago by christiaan59.

The page I need help with: [log in to see the link]