Issue with WebHelp search deleting the sidebar

nwSearchFnt.js:383 Uncaught RangeError: Invalid array length
    at tokenize (nwSearchFnt.js:383)
    at Effectuer_recherche (nwSearchFnt.js:158)
    at Verifie (nwSearchFnt.js:100)
    at HTMLDocument.<anonymous> (main.js:68)
    at o (jquery-1.7.2.min.js:2)
    at Object.fireWith (jquery-1.7.2.min.js:2)
    at Function.ready (jquery-1.7.2.min.js:2)
    at HTMLDocument.B (jquery-1.7.2.min.js:2)