Doubt To Devotion: My Untold Origin Story

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Fatal error: Uncaught TypeError: str_replace(): Argument #3 ($subject) must be of type array|string, WP_Error given in /var/www/wp-content/themes/fotografie/inc/breadcrumb.php:100 Stack trace: #0 /var/www/wp-content/themes/fotografie/inc/breadcrumb.php(100): str_replace('<a', '<span class="br...', Object(WP_Error)) #1 /var/www/wp-content/themes/fotografie/components/features/breadcrumb/breadcrumb.php(14): fotografie_breadcrumb() #2 /var/www/wp-includes/template.php(812): require('/var/www/wp-con...') #3 /var/www/wp-includes/template.php(745): load_template('/var/www/wp-con...', false, Array) #4 /var/www/wp-includes/general-template.php(206): locate_template(Array, true, false, Array) #5 /var/www/wp-content/themes/corporate-fotografie/header.php(49): get_template_part('components/feat...') #6 /var/www/wp-includes/template.php(810): require_once('/var/www/wp-con...') #7 /var/www/wp-includes/template.php(745): load_template('/var/www/wp-con...', true, Array) #8 /var/www/wp-includes/general-template.php(48): locate_template(Array, true, true, Array) #9 /var/www/wp-content/themes/fotografie/single.php(10): get_header() #10 /var/www/wp-includes/template-loader.php(106): include('/var/www/wp-con...') #11 /var/www/wp-blog-header.php(19): require_once('/var/www/wp-inc...') #12 /var/www/index.php(17): require('/var/www/wp-blo...') #13 {main} thrown in /var/www/wp-content/themes/fotografie/inc/breadcrumb.php on line 100