Undefined function get_current_user() when editing user.css

[RonHagley]

When I try to edit the user.css file in media/template/site/cassiopeia/css/ Ige the error shown in the attached jpg when I try to save the changes

joomla error report.jpg

[toivo]

Welcome to the Joomla forum!

The function get_current_user() is a native PHP function. Ask your host to enable this inbuilt function.

[RonHagley]

Thank you so much for your valued information, I will contact hosting service for action.

[toivo]

If your host says it is a possible security issue, use the File Manager and its Edit function to access the file from cPanel or a similar page, provided by your host.

[Kubik-Rubik]

Some background:

We only use this built-in function in one place in the entire Joomla! core code. It is used in the Template component when a file is stored on the file system, and its owner is set to the owner of the currently executed PHP script to make it writable.