Problems with msearch2 in modx revolution 2.5.1

I am trying to use msearch2 in modx revolution 2.5.1 -pl. and it worked smoothly while i was testing at local host. but while i was installing at live serve i got the problem below, How can i solve it?

[2016-11-12 10:20:45] (ERROR @ /home/nepaltrekkingtou/public_html/core/model/modx/modx.class.php : 991) `[[+landing` is not a valid integer and may not be passed to makeUrl() [ed. note: iusemodx last edited this post 7 years, 5 months ago.]