many error after activate plugin

Strict Standards: Static function FEE_Field_Base::get_object_type() should not be abstract in wp-content/plugins/front-end-editor/php/fields/base.php on line 36

Strict Standards: Declaration of FEE_Field_Terms::wrap() should be compatible with FEE_Field_Post::wrap($content, $post_id = 0) in wp-content/plugins/front-end-editor/php/fields/post.php on line 275

Strict Standards: Declaration of FEE_Field_Tags::wrap() should be compatible with FEE_Field_Terms::wrap($content, $taxonomy, $before, $sep, $after) in wp-content/plugins/front-end-editor/php/fields/post.php on line 284

Strict Standards: Declaration of FEE_Field_Category::wrap() should be compatible with FEE_Field_Terms::wrap($content, $taxonomy, $before, $sep, $after) in wp-content/plugins/front-end-editor/php/fields/post.php on line 293

Strict Standards: Declaration of FEE_Field_Post_Thumbnail::wrap() should be compatible with FEE_Field_Post::wrap($content, $post_id = 0) in wp-content/plugins/front-end-editor/php/fields/post.php on line 335

Strict Standards: Declaration of FEE_Field_Post_Meta::wrap() should be compatible with FEE_Field_Post::wrap($content, $post_id = 0) in wp-content/plugins/front-end-editor/php/fields/post.php on line 401

Strict Standards: Declaration of FEE_Field_Widget::wrap() should be compatible with FEE_Field_Base::wrap($content, $data) in wp-content/plugins/front-end-editor/php/fields/widget.php on line 98

Strict Standards: Declaration of FEE_Field_Comment::wrap() should be compatible with FEE_Field_Base::wrap($content, $data) in wp-content/plugins/front-end-editor/php/fields/other.php on line 54

Strict Standards: Declaration of FEE_Field_Term_Field::wrap() should be compatible with FEE_Field_Base::wrap($content, $data) in wp-content/plugins/front-end-editor/php/fields/other.php on line 104

Strict Standards: Declaration of FEE_Field_Single_Title::wrap() should be compatible with FEE_Field_Term_Field::wrap($content, $term_id, $taxonomy) in wp-content/plugins/front-end-editor/php/fields/other.php on line 120

Strict Standards: Declaration of FEE_Field_Option::wrap() should be compatible with FEE_Field_Base::wrap($content, $data) in wp-content/plugins/front-end-editor/php/fields/other.php on line 267

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