Error message

• Notice: Undefined index: columns in include() (line 35 of /var/www/vhosts/niekkortekaas.be/httpdocs/sites/all/themes/stability/templates/views-view-fields--projects.tpl.php).
• Notice: Undefined index: columns in include() (line 35 of /var/www/vhosts/niekkortekaas.be/httpdocs/sites/all/themes/stability/templates/views-view-fields--projects.tpl.php).