the file:
at the 15th line, you will find:
{url|assign:"searchFormUrl" page="search" op="search" escape=false}
but in the 2.4.8-2 (*.tar.gz) released version you will find the following:
{url|assign:"searchFormUrl" op="search" escape=false}
this will result in an error if you try to search, using this block, in other page different that the “search” page.