Fatal error: Uncaught ValueError: Unknown format specifier "a" in /customers/5/3/a/vatnemobler.no/httpd.www/wp-content/plugins/ut-portfolio/classes/post-types/class-portfolio.php:91
Stack trace:
#0 /customers/5/3/a/vatnemobler.no/httpd.www/wp-content/plugins/ut-portfolio/classes/post-types/class-portfolio.php(91): sprintf('Search %a', 'UT Portfolios')
#1 /customers/5/3/a/vatnemobler.no/httpd.www/wp-includes/class-wp-hook.php(287): UT_Portfolio->register_post_type('')
#2 /customers/5/3/a/vatnemobler.no/httpd.www/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)
#3 /customers/5/3/a/vatnemobler.no/httpd.www/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#4 /customers/5/3/a/vatnemobler.no/httpd.www/wp-settings.php(546): do_action('init')
#5 /customers/5/3/a/vatnemobler.no/httpd.www/wp-config.php(91): require_once('/customers/5/3/...')
#6 /customers/5/3/a/vatnemobler.no/httpd.www/wp-load.php(37): require_once('/customers/5/3/...')
#7 /customers/5/3/a/vatnemobler.no/httpd.www/wp-blog-header.php(13): require_once('/customers/5/3/...')
#8 /customers/5/3/a/vatnemobler.no/httpd.www/index.php(17): require('/customers/5/3/...')
#9 {main}
  thrown in /customers/5/3/a/vatnemobler.no/httpd.www/wp-content/plugins/ut-portfolio/classes/post-types/class-portfolio.php on line 91