Strange Message On Homepage

[ Moderator note: title adjusted, please refrain from using help, urgent, emergency, asap, etc. in topic titles. ]

Hello there.
This is a very wonderful theme, i’ve loved and used HappyStance for almost a year now. All was fine while my site being hosted by “Fast Hosts” but as soon as i transferred the site to the “Hostgator” , i’ve been seeing this strange message “Warning: sprintf(): Too few arguments in /home3/wac66c0abzuk/public_html/wp-includes/theme.php on line 875” at the top homepage and this is visible to all my site visitors, please i need help to fix this issue. Otherwise i love your theme so much and i plan on getting the pro version as things go well for the project am using it for.

PS. please let me know if i need to provide you my login details so you can help me solve this problem.
Thanks in advance.