Extrafield install problem

Extrafield install problem

Hello, after when i bought addon's for discount code (extrafield) and install it does not show in admin and website.
Joomla version: 3.9.21
Jshopping: Version 4.12.3

Addon ver. installed Coupons extrafields 2.8.1

It's shows in addons but only there, i do not have any option to menage it in admin and does not seems in checkout.

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Aw: Extrafield install problem

Problem already solved, need to activate discount options in admin.