I tried to setup PrimeFlex (3.0.1) for PrimeFaces (10.0.0). I used css files as provided in dist folder of PrimeFlex repo. Also I followed the instructions give
stringtemplate-4
nav
fallback
qt5.15
mailchimp-api-v3
maxscript
machine-code
evosuite
system.speech.recognition
jstatd
diskspace
android-intent
contextual-action-bar
messagebroker
trestle-admin
humanize
params
itk
hotswapagent
bxslider
guidewire
mixed-content
ion-content
add
mobile-application
tkinter-entry
coroutinescope
swagger-php
srp-protocol
user-interface