Css not downloading properly

Your problem primarily has nothing to do with CSS or quic.cloud, but rather with the Guestmode function. Please read this article and come back if you have any further questions.

https://blog.litespeedtech.com/2021/06/01/guest-mode-for-wordpress-in-lscwp-v4-0/

for a simple workaround , please go to Page Optm -> Tuning CSS -> UCSS exclude URI, add / into it

for more detailed fix, please check this page

Hello, thanks for your help, I added this / in the UCSS URL Exclude, but after a few tours to Page Speed Insight, this simple setting is slowing down the site. I guess I have to try with another theme.

but did it work ? narrow down the issue first, then we will see what to do next