Fatal error: Uncaught Error: Call to undefined function serialize_block_attributes() in /opt/app-root/src/wp-content/plugins/simply-gallery-block/blocks/init.php:111 Stack trace: #0 /opt/app-root/src/wp-includes/class-wp-block-type.php(109): pgc_sgb_render_callback(Array, '\n<div class="wp...') #1 /opt/app-root/src/wp-includes/blocks.php(218): WP_Block_Type->render(Array, '\n<div class="wp...') #2 /opt/app-root/src/wp-includes/blocks.php(276): render_block(Array) #3 /opt/app-root/src/wp-includes/class-wp-hook.php(286): do_blocks('<!-- wp:paragra...') #4 /opt/app-root/src/wp-includes/plugin.php(208): WP_Hook->apply_filters('<!-- wp:paragra...', Array) #5 /opt/app-root/src/wp-includes/post-template.php(247): apply_filters('the_content', '<!-- wp:paragra...') #6 /opt/app-root/src/wp-content/themes/travel-master/template-parts/content-single.php(33): the_content('Continue readin...') #7 /opt/app-root/src/wp-includes/template.php(706): require('/opt/app-root/s...') #8 /opt/app-root/src/wp-includes/template.php(653): load_templ in /opt/app-root/src/wp-content/plugins/simply-gallery-block/blocks/init.php on line 111