DNS jeedom openVPN

bonjour a tous, j’ai soucis il y a quelques jours au service pack ultimate de jeedom et le dns ne cesse de s’arreter de lui meme.
dans mes log d’openVPN, j’ai:

Fri Mar 12 13:15:45 2021 WARNING: file '/tmp/jeedom/openvpn/openvpn_auth_h0ODCFXvdVBZe6H7g1ffUcctJhUlwQ.conf' is group or others accessible
Fri Mar 12 13:15:45 2021 OpenVPN 2.4.7 arm-unknown-linux-gnueabihf [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Feb 20 2019
Fri Mar 12 13:15:45 2021 library versions: OpenSSL 1.1.1d  10 Sep 2019, LZO 2.10
Fri Mar 12 13:15:45 2021 WARNING: No server certificate verification method has been enabled.  See http://openvpn.net/howto.html#mitm for more info.
Fri Mar 12 13:15:45 2021 TCP/UDP: Preserving recently used remote address: [AF_INET]135.125.10.213:1197
Fri Mar 12 13:15:45 2021 UDP link local: (not bound)
Fri Mar 12 13:15:45 2021 UDP link remote: [AF_INET]135.125.10.213:1197
Fri Mar 12 13:15:45 2021 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Fri Mar 12 13:15:45 2021 VERIFY OK: depth=1, C=FR, ST=IDF, L=Paris, O=jeedom.com, OU=jeedom.com, CN=jeedom.com CA, name=jeedom, emailAddress=postmaster@jeedom.com
Fri Mar 12 13:15:45 2021 VERIFY OK: depth=0, C=FR, ST=IDF, L=Paris, O=jeedom.com, OU=jeedom.com, CN=server, name=jeedom, emailAddress=postmaster@jeedom.com
Fri Mar 12 13:15:45 2021 Control Channel: TLSv1.3, cipher TLSv1.3 TLS_AES_256_GCM_SHA384, 1024 bit RSA
Fri Mar 12 13:15:45 2021 [server] Peer Connection Initiated with [AF_INET]135.125.10.213:1197
Fri Mar 12 13:15:46 2021 Data Channel: using negotiated cipher 'AES-256-GCM'
Fri Mar 12 13:15:46 2021 Outgoing Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
Fri Mar 12 13:15:46 2021 Incoming Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
Fri Mar 12 13:15:46 2021 ERROR: Cannot open TUN/TAP dev /dev/net/tun: No such device (errno=19)
Fri Mar 12 13:15:46 2021 Exiting due to fatal error

j’ai ouvert un ticket pour de l’aide mais les proposition qui me sont donné n’ont pas de rapport avec mon probleme ou mon installation (je suis sur RPI 4, et on me propose docker sur syno).
quelqu’un pourrait m’aider?