WPML's style sheets point to /ontent/ instead of /wp-content/

Overview of the issue

Under certain hosting environments, you will notice that WPML’s style sheets do not load correctly. If you check the browser console, you will notice that the style sheets point to the folder /ontent/ instead of /wp-content/.  For example:

https://domain.com/ontent/plugins/sitepress-multilingual-cms/templates/language-switchers/legacy-list-horizontal/style.css?ver=1

Workaround

Make a full backup of your site before proceeding.

1. Open /wp-content/plugins/sitepress-multilingual-cms/classes/class-wpml-file.php file.
2. Look for line 66:
3. Replace:

   public function get_uri_from_path( $path ) {
       $base = null;
     
       if ( $this->wp_api->defined( 'WP_CONTENT_DIR' ) && $this->wp_api->defined( 'WP_CONTENT_URL' ) ) {
           $base_path = $this->fix_dir_separator( $this->wp_api->constant( 'WP_CONTENT_DIR' ) );
     
           if ( 0 === strpos( $path, $base_path ) ) {
               $base = array(
                   'path' => $base_path,
                   'uri'  => $this->wp_api->constant( 'WP_CONTENT_URL' ),
               );
           }
       }
     
       if ( ! $base ) {
           $base = array(
               'path' => $this->wp_api->constant( 'ABSPATH' ),
               'uri'  => site_url(),
           );
       }
     
       $base['uri']   = preg_replace( '/(^https?:)/', '', $base['uri'] );
       $relative_path = substr( $path, strlen( $base['path'] ) );
       $relative_path = str_replace( array( '/', '' ), '/', $relative_path );
       $relative_path = ltrim( $relative_path, '/' );
     
       return trailingslashit( $base['uri'] ) . $relative_path;
   }
   

4. With:

   
   	public function get_uri_from_path( $path ) {
   		$base = null;
   
   		if ( $this->wp_api->defined( 'WP_CONTENT_DIR' ) && $this->wp_api->defined( 'WP_CONTENT_URL' ) ) {
   			$base_path = $this->fix_dir_separator( $this->wp_api->constant( 'WP_CONTENT_DIR' ) );
   
   			if ( 0 === strpos( $path, $base_path ) ) {
   				$base = array(
   					'path' => $base_path,
   					'uri'  => $this->wp_api->constant( 'WP_CONTENT_URL' ),
   				);
   			}
   		}
   
   		if ( ! $base ) {
   			$base = array(
   				'path' => $this->wp_api->constant( 'ABSPATH' ),
   				'uri'  => site_url(),
   			);
   			if ( 0 !== strpos( $path, $base_path ))
   			{
   				$search = (WPML_PLUGIN_PATH);
   				$pathexplode = explode($this->wp_api->constant( 'DIRECTORY_SEPARATOR' ), WPML_PLUGIN_PATH);
   				$pathexplode = array_slice($pathexplode, -3, 3, false);
   				$replace = $pathexplode[0] .$this->wp_api->constant( 'DIRECTORY_SEPARATOR' ) . $pathexplode[1].$this->wp_api->constant( 'DIRECTORY_SEPARATOR' ).WPML_PLUGIN_FOLDER;
   				$base["path"] = str_replace ($replace, "", $search);
   			}
   		}
   
   		$base['uri']   = preg_replace( '/(^https?:)/', '', $base['uri'] );
   		$relative_path = substr( $path, strlen( $base['path'] ) );
   		$relative_path = str_replace( array( '/', '\' ), '/', $relative_path );
   		$relative_path = ltrim( $relative_path, '/' );
   
   		return trailingslashit( $base['uri'] ) . $relative_path;
   	}