– The 503 service unavailable error occurs when your web server is unable to get a proper response from a PHP script. This PHP script could be a WordPress plugin, a theme, or a misbehaving custom code snippet.
– If the error is caused by heavy usage, a server glitch, server temporarily offline for maintenance, the server too busy or concurrent request limit exceeded, or a DDoS attack, then it could automatically disappear in a few minutes.
– However, if it is caused by bad code on your website, then it will keep occurring unless you find and disable the code that’s causing it.
To troubleshoot, try:
– Deactivate plugins, switch theme, reinstall WP
– If these methods fail to resolve the error, then try contacting your hosting providert.
– See https://www.wpbeginner.com/wp-tutorials/how-to-fix-503-service-unavailable-error-in-wordpress/
