Hi contao developer out there, Anybody knows why the styling of the whole admin backend's missing. I attach a screenshot, let me know if anyone knows something. enter image description here
Problem solved. The fact that, the problem comes from the server configuration. The Php process wasn't have enough permission, so it takes me some time to realise and knowing that I need to change the apache modul version to cgi/fpm mode.
This grants the php to recreate and generate the assets including js/css in asset folder. (at least from my own observation) and it works now.