Hi,
@T-Online: You don't seem to be editing the right menu, in the menu settings you selected the display in "List", but on frontend the "Table" listing is used. Please give us a link to the page with the issue, that way we will give you the id of the menu to edit.
@johnh823:
1. The settings are broken in backend, this might cause the issue.
Please give us a backend access via our contact form (with a link to this topic):
hikashop.com/support/contact-us.html
2. That's a bug of your Joomla template. Please contact them for that fatal error message.