I like to use the WordPress Android app to quickly edit this site. Whenever I reinstall WordPress, it cannot connect directly and returns a XML-RPC issue claiming support is missing on the server.
The solution is to (1) ensure Jetpack plugin is installed on the site, (2) not to connect directly to the site from the WordPress Android app but instead to login to my wordpress.com account which is connected to the site.
That allows me to edit the site quickly using the WordPress app.