}
            return response;
        } catch (final Exception e) {
            logger.warn("Failed to load: {}", doc, e);
            saveError(messages -> messages.addErrorsNotLoadFromServer(GLOBAL, targetUrl));
            return redirect(ErrorAction.class);
        }
    }

    /**
     * Checks if the given URL represents a file system path.

     * </pre>
     * @param property The property name for the message. (NotNull)
     * @param arg0 The parameter arg0 for message. (NotNull)
     * @return this. (NotNull)
     */
    public FessMessages addErrorsNotLoadFromServer(String property, String arg0) {
        assertPropertyNotNull(property);
        add(property, new UserMessage(ERRORS_not_load_from_server, arg0));
        return this;
    }

    /**