Magento service temporarily unavailable Solution

Agent upgrade error or installation failure

The service temporarily unavailable error may occur, so that the front-end and backend of the website cannot be displayed.

If the error still persists after the operation is completed, you can use the following methods:

1. Delete the maintenance. Flag under the root directory of the website. It should appear if it is not refreshed;

2. Delete the content in the var/cache folder of the website. If you delete the cache folder, The cache_dir file may not be writable. manually create the folder and run chmod 777.

3. Now the website is displayed normally.

Magento service temporarily unavailable Solution