Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, non-static method prettygallery::prettygallery_scripts() cannot be called statically in /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/class-wp-hook.php:287 Stack trace: #0 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #1 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #2 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/script-loader.php(2294): do_action('wp_enqueue_scri...') #3 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/class-wp-hook.php(287): wp_enqueue_scripts('') #4 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #5 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #6 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/general-template.php(2884): do_action('wp_head') #7 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-content/themes/twentyseventeen/header.php(22): wp_head() #8 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/template.php(723): require_once('/homepages/22/d...') #9 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/template.php(672): load_template('/homepages/22/d...', true) #10 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/general-template.php(41): locate_template(Array, true) #11 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-content/themes/twentyseventeen/404.php(13): get_header() #12 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/template-loader.php(106): include('/homepages/22/d...') #13 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-blog-header.php(19): require_once('/homepages/22/d...') #14 /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/index.php(17): require('/homepages/22/d...') #15 {main} thrown in /homepages/22/d461571465/htdocs/clickandbuilds/MapletreeApartmentsatMedford/wp-includes/class-wp-hook.php on line 287