It is better this way:
1) Boot into twrp, format data (yes), swipe to factory reset, reboot back into twrp
2) flash Flash FW_BB_V10.3.9.0.PFBEUXM.zip + crDroidAndroid-9.0-20190924-grus-v5.8.zip + gapps (arm64_9.0_pico) & magisk (if needed) in one step
5) Reboot and pray || enjoy !
Use FW FW_BB_V10.3.9.0.PFBEUXM.zip. Anyone else
So... tank you Petr78, I have installed crDroid 5.8
20190924 with FW_BB_
V10.3.9.0.PFBEUXM.zip, ANX camera and Magisk. I had a loop/fastboot, I flashed vmeta and fortunately this solved the problem

I like this ROM more than MIUI 11, especially links/shortcuts from APP to home screen ... and no Google Photo but Gcam 7
I still have some problems to clone whats-app, I've tried two apps from the play-store for cloning but WA doesn't work very well and sometimes it crashes. I don't see how to clone apps from crDroid settings.
I've few more questions...
Is it possible to add a new pages on the the
left side of the Home screen ?
Is it possible to re-map the back button and other buttons on the navigation bar : long press > kill the app ?
[How can I visualize Mobile data icon to see if data are received or transmitted by the phone (up/down arrow) ?]
EDIT: I've found the icon for data mobile !
Thanks !
Marco