* Checks to see if the `DISABLE_WP_CRON` constant is set; errors if true
	 * because WP-Cron is disabled.
	 * * Checks to see if the `ALTERNATE_WP_CRON` constant is set; warns if true.
	 * * Attempts to spawn WP-Cron over HTTP; warns if non 200 response code is
	 * returned.
	 *
	 * @since 2.8.0
	 *
	 * @link  https://github.com/wp-cli/cron-command/blob/v2.3.1/src/Cron_Command.php#L14-L55
	 *
	 * @return bool
	 */
	public static function is_wpcron_working(): bool {
		if ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON ) {
			$errormsg = 'The DISABLE_WP_CRON constant is set to true. WP-Cron spawning is disabled.';
			return false;
		}

		if ( defined( 'ALTERNATE_WP_CRON' ) && ALTERNATE_WP_CRON ) {
			$errormsg = 'The ALTERNATE_WP_CRON constant is set to true. WP-Cron spawning is not asynchronous.';
			return false;
		}

		$spawn = self::get_cron_spawn();

		if ( is_wp_error( $spawn ) ) {
			$errormsg = sprintf( 'WP-Cron spawn failed with error: %s', $spawn->get_error_message() );
			return false;
		}

		$code    = wp_remote_retrieve_response_code( $spawn );
		$message = wp_remote_retrieve_response_message( $spawn );

		if ( 200 === $code ) {
			// WP-Cron spawning is working as expected.
			return true;
		} else {
			$errormsg = sprintf( 'WP-Cron spawn returned HTTP status code: %1$s %2$s', $code, $message );
			return false;
		}
	}

	/**
	 * Spawns a request to `wp-cron.php` and return the response.
	 *
	 * This function is designed to mimic the functionality in `spawn_cron()`
	 * with the addition of returning the result of the `wp_remote_post()`
	 * request.
	 *
	 * @since 2.8.0
	 *
	 * @link  https://github.com/wp-cli/cron-command/blob/v2.3.1/src/Cron_Command.php#L57-L91
	 *
	 * @global $wp_version WordPress version string.
	 *
	 * @return WP_Error|array The response or WP_Error on failure.
	 */
	protected static function get_cron_spawn() {
		global $wp_version;

		$sslverify     = version_compare( $wp_version, 4.0, '<' );
		$doing_wp_cron = sprintf( '%.22F', microtime( true ) );

		$cron_request_array = array(
			'url'  => site_url( 'wp-cron.php?doing_wp_cron=' . $doing_wp_cron ),
			'key'  => $doing_wp_cron,
			'args' => array(
				'timeout'   => 3,
				'blocking'  => true,
				// phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- Calling native WordPress hook.
				'sslverify' => apply_filters( 'https_local_ssl_verify', $sslverify ),
			),
		);

		// phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- Calling native WordPress hook.
		$cron_request = apply_filters( 'cron_request', $cron_request_array );

		// Enforce a blocking request in case something that's hooked onto the 'cron_request' filter sets it to false.
		$cron_request['args']['blocking'] = true;

		$result = wp_remote_post( $cron_request['url'], $cron_request['args'] );

		return $result;
	}

	/**
	 * Gets the BoldGrid API URL
	 *
	 * This URL can be overridden by defining W3TC_API2_URL
	 *
	 * @since 2.8.3
	 *
	 * @return string The API URL to use for requests.
	 */
	public static function get_api_base_url() {
		return defined( 'W3TC_API2_URL' ) && W3TC_API2_URL ? esc_url( W3TC_API2_URL, array( 'https' ), '' ) : 'https://api2.w3-edge.com';
	}
}
<br />
<b>Fatal error</b>:  Uncaught Error: Class &quot;W3TC\Util_Environment&quot; not found in /home/devangso/public_html/wp-content/plugins/w3-total-cache/Config.php:175
Stack trace:
#0 /home/devangso/public_html/wp-content/plugins/w3-total-cache/Dispatcher.php(36): W3TC\Config-&gt;__construct()
#1 /home/devangso/public_html/wp-content/plugins/w3-total-cache/Dispatcher.php(49): W3TC\Dispatcher::component('Config')
#2 /home/devangso/public_html/wp-content/plugins/w3-total-cache/Mobile_Redirect.php(38): W3TC\Dispatcher::config()
#3 /home/devangso/public_html/wp-content/plugins/w3-total-cache/Dispatcher.php(36): W3TC\Mobile_Redirect-&gt;__construct()
#4 /home/devangso/public_html/wp-content/advanced-cache.php(36): W3TC\Dispatcher::component('Mobile_Redirect')
#5 /home/devangso/public_html/wp-settings.php(100): include('/home/devangso/...')
#6 /home/devangso/public_html/wp-config.php(99): require_once('/home/devangso/...')
#7 /home/devangso/public_html/wp-load.php(50): require_once('/home/devangso/...')
#8 /home/devangso/public_html/wp-blog-header.php(13): require_once('/home/devangso/...')
#9 /home/devangso/public_html/index.php(17): require('/home/devangso/...')
#10 {main}
  thrown in <b>/home/devangso/public_html/wp-content/plugins/w3-total-cache/Config.php</b> on line <b>175</b><br />