source code of index.php displayed (CI4)

so your serving from your home directory of user robert with a sub directory inside home called public_html . i.e your not serving directly from apache . it adds extra fiddling with having to i think with ubuntu :

Code:

sudo a2enmod userdir

So any reason not to server from apache direct ?

CMS CI4 A CMS system, runs out of the box written on top of CI4

Arch Book  CodeIgniter4 on Apache(pages 92-114) 

Github