Error Message on Fundraiser Page (No Content Displayed)

I receive the following error message when I try to view a fundraiser. See below.

Code:
Catchable fatal error: Object of class WP_Error could not be converted to string in /home/oracles2/public_html/tulc/wp-content/themes/wpaid/functions.php on line 78

Can someone help me with this?

Thanks

Shinshuri