The first step in troubleshooting the site is to install the Health Check plugin. Navigate to Plugins > Add New and search for “Health Check.” The plugin by “The WordPress.org Community” is the one you want.

You can also download it directly from the WordPress Plugin Directory.

Once it is installed and activated, you’ll see a new “Health Check” section under the “Dashboard” menu item on the back end of your site. Click that to be taken to the Health Check Settings.

source: Givewp.