Warning: Trying to access array offset on value of type bool in /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-content/themes/Divi/includes/builder/functions.php on line 2583

Warning: Cannot modify header information - headers already sent by (output started at /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-content/themes/Divi/includes/builder/functions.php:2583) in /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-content/themes/Divi/includes/builder/core.php on line 3559

Fatal error: Uncaught ValueError: Unknown format specifier " " in /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-content/themes/Divi/includes/builder/class-et-builder-element.php:3245
Stack trace:
#0 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-content/themes/Divi/includes/builder/class-et-builder-element.php(3245): sprintf('W\xC3\xA4hlen Sie ein...', 'Titel')
#1 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-content/themes/Divi/includes/builder/class-et-builder-element.php(2779): ET_Builder_Element->_add_font_fields()
#2 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-content/themes/Divi/includes/builder/class-et-builder-element.php(325): ET_Builder_Element->_add_additional_fields()
#3 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-content/themes/Divi/includes/builder/module/Accordion.php(428): ET_Builder_Element->__construct()
#4 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-content/themes/Divi/includes/builder/main-modules.php(23): require_once('/customers/d/6/...')
#5 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-content/themes/Divi/includes/builder/framework.php(550): require_once('/customers/d/6/...')
#6 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-includes/class-wp-hook.php(308): et_builder_add_main_elements(Object(WP))
#7 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array)
#8 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-includes/plugin.php(565): WP_Hook->do_action(Array)
#9 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-includes/class-wp.php(797): do_action_ref_array('wp', Array)
#10 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-includes/functions.php(1332): WP->main('')
#11 /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-blog-header.php(16): wp()
#12 /customers/d/6/9/bossdom-ktts.de/httpd.www/index.php(17): require('/customers/d/6/...')
#13 {main}
  thrown in /customers/d/6/9/bossdom-ktts.de/httpd.www/wp-content/themes/Divi/includes/builder/class-et-builder-element.php on line 3245