When installing a new theme in appearance > themes > add new, the following message can sometimes be displayed :
“The link you followed has expired.“
This message is displayed because your server settings for upload max size or maximum memory are not well configured.
Don’t worry, this is a common issue, very easy to fix.
If you are unable to find the settings of PHP / memory then contact your hosting provider to do it for you. This is their job, it takes just 5 minutes to do it.
Show them a screenshot of your error, or email them the error message. Ask them to help by increasing the following values, until you are able to install your theme or upload your image.
memory_limit upload_max_size post_max_size upload_max_filesize max_execution_time max_input_time
If you know how to change the PHP and memory settings of your server then change PHP and memory settings preferably to the following values. Most hosting companies provide a way to change the values from the hosting control panel.
memory_limit = 256 upload_max_size = 256M post_max_size = 256 upload_max_filesize = 256 max_execution_time = 600 max_input_time = 2000