Debugbar not showing up

Also check in the head of views that there is nothing like :

Code:

<meta http-equiv="Content-Security-Policy" content=" default-src 'none';  form-action 'self'; frame-src 'self' ;          ; font-src 'self'  maxcdn.bootstrapcdn.com ;  img-src 'self'; script-src 'self'  http  "        />

Content Security Policy via  meta in head can restrict images , js  , style sheets from both local and remote sources if not tweked finely

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

Arch Book  CodeIgniter4 on Apache(pages 92-114) 

CI4-CMS Github