Custom Fields NOT show in P Control Panel

i have Book Your Travel template for my website
i create some groups under Custom Fields long time but now i can’t see the categories in my WP CPanel
how i can show this categories since i can’t edit or do anything now because i cant see them in my Panel
i can see some of this groups but if i try to enter any of names there is Error 404 and i can’t fix it because i can’t access this group in Panel

**PS: all groups active


Contact with your item author hope they will help you out from your issue.