[Koha] Search error: Can't call method "data" on an undefined value at /usr/share/koha/lib/C4/Search.pm line 1915.

Hi guys! I'm getting the following error message when I search the catalog: "Can't call method "data" on an undefined value at /usr/share/koha/lib/C4/Search.pm line 1915. For help, please send mail to the webmaster ([no address given]), giving this error message and the time and date of the error." Has anyone ever experienced this? Thanks! -- Ítalo Barbosa Brasileiro