Builder mode not displaying, and got this error:
WP 6.6
PHP Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "_fl_builder_post_grid_custom" not found or invalid function name in /wordpress/core/6.6.1/wp-includes/class-wp-hook.php:326
Stack trace: #0 /wordpress/core/6.6.1/wp-includes/plugin.php(205): WP_Hook->apply_filters('/srv/htdocs/wp-...', Array) #1 /srv/htdocs/wp-content/plugins/bb-plugin/modules/post-carousel/includes/frontend.php(28): apply_filters('fl_builder_post...', '/srv/htdocs/wp-...', 'grid', Object(stdClass), Object(FLPostCarouselModule)) #2 /srv/htdocs/wp-content/plugins/bb-plugin/includes/module-content.php(8): include('/srv/htdocs/wp-...') #3 /srv/htdocs/wp-content/plugins/bb-plugin/includes/module.php(4): include('/srv/htdocs/wp-...') #4 /srv/htdocs/wp-content/plugins/bb-plugin/classes/class-fl-builder.php(3033): include('/srv/htdocs/wp-...') #5 /srv/htdocs/wp-content/plugins/bb-plugin/classes/class-fl-builder.php(2984): FLBuilder::render_module(Object(stdClass)) #6 /srv/htdocs/wp-content/plugins/bb-plugin/includes/column.php(3): FLBuilder::render_modules(Object(stdClass)) #7 /srv/htdocs/wp-content/plugins/bb-plugin/classes/class-fl-builder.php(2844): include('/srv/htdocs/wp-...') #8 /srv/htdocs/wp-content/plugins/bb-plugin/includes/column-group.php(7): FLBuilder::render_column(Object(stdClass)) #9 /srv/htdocs/wp-content/plugins/bb-plugin/classes/class-fl-builder.php(2755): include('/srv/htdocs/wp-...') #10 /srv/htdocs/wp-content/plugins/bb-plugin/includes/row.php(13): FLBuilder::render_column_group(Object(stdClass)) #11 /srv/htdocs/wp-content/plugins/bb-plugin/classes/class-fl-builder.php(2525): include('/srv/htdocs/wp-...') #12 /srv/htdocs/wp-content/plugins/bb-plugin/classes/class-fl-builder.php(2486): FLBuilder::render_row(Object(stdClass)) #13 /srv/htdocs/wp-content/plugins/bb-plugin/classes/class-fl-builder.php(2254): FLBuilder::render_rows() #14 /srv/htdocs/wp-content/plugins/bb-plugin/classes/class-fl-builder.php(2107): FLBuilder::render_nodes() #15 /srv/htdocs/wp-content/plugins/bb-theme-builder/classes/class-fl-theme-builder-layout-renderer.php(453): FLBuilder::render_content_by_id(2368, 'div', Array) #16 /srv/htdocs/wp-content/plugins/bb-theme-builder/includes/content.php(3): FLThemeBuilderLayoutRenderer::render_content() #17 /wordpress/core/6.6.1/wp-includes/template-loader.php(106): include('/srv/htdocs/wp-...') #18 /wordpress/core/6.6.1/wp-blog-header.php(19): require_once('/wordpress/core...') #19 /wordpress/core/6.6.1/index.php(17): require('/wordpress/core...') #20 {main} thrown in /wordpress/core/6.6.1/wp-includes/class-wp-hook.php on line 326