Fix compatibility issue with WP VIP Codeinwp/visualizer-pro#396

Author: girishpanchal30

classes/Visualizer/Module.php

@@ -523,6 +523,10 @@ protected function get_user_customization_js() {
 		require_once( ABSPATH . 'wp-admin/includes/file.php' );
 		WP_Filesystem();
 		global $wp_filesystem;
+		if ( ! is_a( $wp_filesystem, 'WP_Filesystem_Base' ) ) {
+			$creds = request_filesystem_credentials( site_url() );
+			wp_filesystem( $creds );
+		}
 
 		$multisite_arg = '/';
 		if ( is_multisite() && ! is_main_site() ) {

classes/Visualizer/Module/Chart.php

@@ -1587,6 +1587,10 @@ public function save_chart_image( $base64_img, $chart_id, $save_attachment = tru
 		require_once ABSPATH . '/wp-admin/includes/file.php';
 		\WP_Filesystem();
 		global $wp_filesystem;
+		if ( ! is_a( $wp_filesystem, 'WP_Filesystem_Base' ) ) {
+			$creds = request_filesystem_credentials( site_url() );
+			wp_filesystem( $creds );
+		}
 		$upload_file = $wp_filesystem->put_contents( $upload_path . $hashed_filename, $decoded );
 
 		// Insert new chart image.