Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, non-static method wp_posts_filter::wppf_filter_me() cannot be called statically in /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-includes/class-wp-hook.php:308 Stack trace: #0 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #1 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-includes/plugin.php(565): WP_Hook->do_action(Array) #2 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-includes/class-wp-query.php(1833): do_action_ref_array('pre_get_posts', Array) #3 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-includes/class-wp-query.php(3749): WP_Query->get_posts() #4 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-content/plugins/contact-form-7/includes/contact-form.php(89): WP_Query->query(Array) #5 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-content/plugins/contact-form-7/includes/block-editor/block-editor.php(57): WPCF7_ContactForm::find(Array) #6 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-includes/class-wp-hook.php(306): wpcf7_init_block_editor_assets() #7 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #8 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #9 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-settings.php(617): do_action('init') #10 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-config.php(80): require_once('/customers/2/7/...') #11 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-load.php(50): require_once('/customers/2/7/...') #12 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-blog-header.php(13): require_once('/customers/2/7/...') #13 /customers/2/7/f/iedjevisserphotography.nl/httpd.www/index.php(17): require('/customers/2/7/...') #14 {main} thrown in /customers/2/7/f/iedjevisserphotography.nl/httpd.www/wp-includes/class-wp-hook.php on line 308