Thanks for your answer. I found few errors in logread:
Wed May 6 17:18:02 2020 daemon.err odhcpd[1043]: Failed to send to ff02::1%lan@br-lan (Address not available)
Wed May 6 17:18:05 2020 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
[...]
Wed May 6 17:18:05 2020 daemon.err hostapd: Using interface wlan0 with hwaddr xx:xx:xx:xx:xx:xx and ssid "BCLS"
# logread
See the file (to big for this post): http://dpaste.com/22B6FR9
The error about ujail seems not critical
I don't understand the error about hostapd but it's about wifi isn't it ?