Hi!
Could you please read this:
http://wordpress.org/support/topic/fatal-error-1178
Are you hosted by GoDaddy?
*Before* trying to fix the issue, could you check your database for the _transient_pll_languages_list entry in the table wp_options and report the value field here?
Then try to repair your database. Then if the issue is still there, could you try the fixes I propose in the other topic?
Also could you give me your PHP version and MySQL versions?