i see in my error log "15 May (07:57:05) | DEBUG: Language string failed to load: connect_host on line# 156 (file: /home/xxx/public_html/includes/classes/rlMail.class.php)"

what does this means exactly and how can i fix it? i think that this is creating the email issues that i have - emails do not arrive when listing is about to expire and when it will actualy expire.