How to fix “The link you followed has expired” in WordPress

When installing a new theme in appearance > themes > add new, the following message can sometimes be displayed :

This message is displayed because your server settings for upload max size or maximum memory are not well configured.

Solution

Don’t worry, this is a common issue, very simple to fix.

If you are not used to set your server php / memory settings, contact your hosting company to do it for you. This is their job, it takes 1 minute to do.

Show them a screenshot of your error, or email them the error message. Ask them to assist 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