Quick Search function won't work on WHMCS V5.3.5 !

Hello,

After upgrading to WHMCS V5.3.5 the quick search located on top right hand side won't work!. When I put any customer name and hit enter it won't search it just refreshes the page. Just before the upgrade it was fine but now I am not able to search!!

Please help me to fix this issue ASP..

Thanks