Problem with older template

Thank you

I have installed new version but it didn't change anything.

1) Problem with error 404 after clicking the wishlist in module
2) still I can't see "add to wishlist" from category view

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Fatal Error catcher says:
RuposTel.com plg_system_fatal_catcher plugin detected a problem with your site.
Your site caused a blank screen upon a visit of this URL:

edziewiarka.com/component/vm2wishlists/list/2-aaaaa/test

Error message data:
1 Call to a member function get() on null in file: /home/admin/domains/edziewiarka.com/public_html/components/com_vm2wishlists/models/list.php line: 247

Have you created a menu item to default lists if you use default lists?
This is the reason why you get the error.

You need one per 'default' (shared) list, even if the menu item is in a hidden menu.
Let me know how it helps.