Experiment with require statement, because if we are here, then class didnt existed.

plugins/woocommerce/includes/class-wc-autoloader.php

@@ -73,7 +73,7 @@ class WC_Autoloader {
 	 */
 	private function load_file( $path ) {
 		if ( $path && is_readable( $path ) ) {
-			include_once $path;
+			require $path;
 			return true;
 		}
 		return false;