error message

[Anonymous]

Hello,
My pre-open site have error messages.

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method SimilarPosts::execute() should not be called statically in /home/luv2luvbaby/luv2luvbaby.com/public_html/wp-content/plugins/post-plugin-library/common_functions.php on line 586

Strict Standards: Non-static method SimilarPosts::check_post_plugin_library() should not be called statically in /home/luv2luvbaby/luv2luvbaby.com/public_html/wp-content/plugins/similar-posts/similar-posts.php on line 57

Could you teach how to fix it?

Regards
Kuroda

[Author]

Posts