Step 1: %s', 'wp-asset-clean-up'), $data['fetch_url']); ?>... Please wait...
Step 2: Build the list of the fetched assets and print it...

%s... Please wait...', 'wp-asset-clean-up'), $data['fetch_url']); ?>

Is the fetching taking too long? Please do the following:

Check your internet connection and the actual page that is being fetched to see if it loads completely.
If the targeted page loads fine and your internet connection is working fine, please try managing the assets in the front-end view by going to "Settings" -> "Plugin Usage Preferences" -> "Manage in the Front-end"

'.esc_html__('In order to manage the CSS/JS files here, you need to have "Manage in the Dashboard?" enabled within the plugin\'s settings ("Plugin Usage Preferences" tab).', 'wp-asset-clean-up').'

'; echo '

'.esc_html__('If you prefer to manage the assets within the front-end view and wish to hide this meta box, you can click on "Screen Options" at the top of this page and deselect "Asset CleanUp Pro: CSS & JavaScript Manager".').'

'; } elseif ($data['status'] === 3) { _e('The styles and scripts will be available for unload once this post/page is public and published as the whole page needs to be scanned for all the loaded assets.', 'wp-asset-clean-up'); ?>

"Redirect attachment URLs to the attachment itself?" is set to "Yes" in "Search Appearance - Yoast SEO" - "Media" tab).', 'wp-asset-clean-up'); echo ' '.sprintf( esc_html__('As a result, the "%s" side meta box is not shown as it is irrelevant in this situation.', 'wp-asset-clean-up'), WPACU_PLUGIN_TITLE.': '.esc_html__('Options', 'wp-asset-clean-up') ); ?>

post_type; $data['bulk_unloaded_type'] = 'post_type'; $data['is_bulk_unloadable'] = true; $data = $this->setPageTemplate($data); $data['page_options'] = \WpAssetCleanUp\MetaBoxes::getPageOptions($data['post_id']); $data['page_options_with_assets_manager_no_load'] = true; include __DIR__.'/meta-box-restricted-page-load.php'; } ?>