New callback error

New error suddenly happening on all forms:

call_user_func_array(): Argument #1 ($callback) must be a valid callback, class GFWCP_CartPage does not have a method “on_gform_pre_process”

The GFWCP_CartPage class is most likely part of the WooCommerce Gravity Forms Product Add-ons plugin. You’ll need to contact the developer via the WooCommerce site at Element Stark - WooCommerce Marketplace

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