Event page error

Just added my first event using the step-by-step guide. Trying to view the page I get this error:

Warning: include(/home/sitename/public_html/wp-content/themes/thesis_182/single.php) [function.include]: failed to open stream: No such file or directory in /home/sitename/public_html/wp-includes/template-loader.php on line 43

Warning: include() [function.include]: Failed opening '/home/sitename/public_html/wp-content/themes/thesis_182/single.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php:/home/sitename/public_html/wp-content/plugins/wiziapp/includes/blocks:/home/sitename/public_html/wp-content/plugins/wiziapp/includes/blocks/components:/home/sitename/public_html/wp-content/plugins/wiziapp/includes/classes') in /home/sitename/public_html/wp-includes/template-loader.php on line 43