Hi Paul,

First make sure that you're installing the installable file, also what error is displaying while installing the theme? Link expired? That is because of the low PHP settings of your server. You can either increase those settings or install it manually

PHP Recommendations

Memory Size: memory_limit = 256M
Script execution time: max_execution_time = 400
Number of input variables: max_input_vars = 4000

If you don’t have access to the php.ini file, you can add the following values in your .htaccess file:

php_value max_execution_time 400
php_value memory_limit 256M
php_value upload_max_filesize 10M

Be careful using these settings, some hosting companies don’t allow users to change php settings, if you experience any problem after making these changes, please revert these in your .htaccess file, using your FTP client.

How to install manually:

- https://dappercodes.com/installing-wordpress-theme-via-ftp/

Feel free to ask for anything you need.

Kind Regards