In this tutorial, we'll be going over how to fix the "Invalid JSON Parse" error that can occur when using the Google Site Kit plugin on your WordPress site. This error can prevent you from accessing important data in your Google accounts, so it's important to fix it as soon as possible. I solved it by installing health checkup plugin. I installed plugins manually 1) https://wordpress.org/plugins/google-site-kit/ 2) https://wordpress.org/plugins/health-check/ as due to LMS plugin settings unable to install it from wp admin.