I am from ThemeIsle. We have themes like Hestia, Zelle, etc...
I was looking at your plugin for one of our customers. And, find this link giving 404 - https://pickplugins.com/documentation/post-grid/?ref=wordpress.org.
It is here - https://wordpress.org/plugins/post-grid/ titled "Documentation".
Just my two cents 🙂
Welcome to our forum.
Please try following link