BBPress Error

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http://www.wildorigin.online/

WILD ORIGIN
Catchable fatal error: Object of class WP_Error could not be converted to string in /home/content/a2pewpnas01_data03/66/3912866/html/wp-content/themes/simplenotes/functions.php on line 118

I know it is to do with something in my simple notes theme template that bbpress doesn’t like, is there a simple fix for this without removing my theme?