Delete the current ps_linklist module on your ftp, but do not uninstall it to not lose your associated data.
Check if error disappeared.
Try to get the lastest version of this module 3.0.3 : https://github.com/PrestaShop/ps_linklist/releases
Edit History
Delete the current ps_linklist module on your ftp, but do not install it to not lose your associated data.
Check if error disappeared.
Try to get the lastest version of this module 3.0.3 : https://github.com/PrestaShop/ps_linklist/releases