Error message

Notice: Trying to access array offset on value of type bool in at_generate_html_classes() (line 69 of /home/lflcm2caj38n/public_html/sites/all/themes/adaptivetheme/at_core/inc/generate.inc).

DEVOLUCIÓN DE IVA A LOS PROVEEDORES DIRECTOS DE EXPORTADORES DE BIENES 6/6