Since it takes more than 30 seconds for your host to fetch all the files of your website, it shows server time-out error.
The solution is simple: Simply increase the maximum execution time or max_execution_time in php.ini file in your server.
What you have to do is to find php.ini file in your cpanel/plesk panel’s file manager. Right click and select edit to edit the code from max_execution_time = =30 to max_execution_time = 90.
What it will do is, it will increase the maximum execution time to 90 seconds now, so that your host can wait for 90 seconds before exiting the file request.
You can watch this video to see how to do it, even if you can’t find any file named php.ini in your server.
Do not forget to share this useful information with your fellows.