Wrong location for piwik.php and how to change?

Hi, apologies if this has been answered however I couldn’t seem to find a related post.

Basically we have an error as follows :

‘/home/admin/web/stats.etrak.co/public_html/piwik.php’ not found or unable to stat

The actual web files are at ‘’/home/admin/web/stats.etrak.co/public_html/stats/piwik.php’

It would seem therefore that we need to change this location somwhere, however we are unable to work out where?

Sorry if this is an easy question or something stupid we have done.

Any help/advice appreciated.

Best regards