If You Get the Error “The link you followed has expired” During Theme Installation

Please check the following:

Make sure you are following the correct installation process:
Theme Installation Guide

Verify that your server meets all requirements, especially the maximum upload file size:
WordPress Server Requirements for WpRentals

If your max upload size is too low, this issue must be fixed by your hosting provider. Contact them to increase the upload limit.
Here is a video tutorial that explains how to increase the maximum file upload size in WordPress:
How to Increase the Maximum File Upload Size in WordPress

How to Check Your Max Upload Size

Go to Tools > Import in your WordPress dashboard

Install WordPress Importer

Run Importer and Check that the maximum upload file size shown is 64M or higher