WPJAM Autor Category 出错！

宝塔面板 PHP7.4
安装 WPJAM Autor Category 插件以后 报错！
如下：
Fatal error: Uncaught Error: Call to undefined function wpjam_form_fields() in /www/wwwroot/XXX.cn/wp-content/plugins/wpjam-author-category/wpjam-author-category.php:33 Stack trace: #0 /www/wwwroot/XXX.cn/wp-includes/class-wp-hook.php(287): wpjam_edit_author_category_profile() #1 /www/wwwroot/XXX.cn/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters() #2 /www/wwwroot/XXX.cn/wp-includes/plugin.php(478): WP_Hook->do_action() #3 /www/wwwroot/XXX.cn/wp-admin/user-edit.php(725): do_action() #4 {main} thrown in /www/wwwroot/XXX.cn/wp-content/plugins/wpjam-author-category/wpjam-author-category.php on line 33

另：这个插件如何修改成，针对产品分类的修改？！
就是只让某一个用户，只能在某一个产品分类下针对产品进行增删改查？