And this the system log about VPN： Nov 25 15:31:27 mediaserverd(AudioToolbox)[33] <Notice>: SSServerImp.cpp:1242:SystemSoundServerKillSoundsForPID: pid 361(PacketTunnelApp) Nov 25 15:31:27 mediaserverd(AudioToolbox)[33] <Notice>: SSServerImp.cpp:1242:SystemSoundServerKillSoundsForPID: pid 361(PacketTunnelApp) Nov 25 15:31:27 ReportCrash[352] <Notice>: osa_update: Pid 361 'PacketTunnelApp' CORPSE: Parsing KCData Nov 25 15:31:27 osanalyticshelper(OSAnalytics)[283] <Notice>: Process PacketTunnelApp [361] killed by jetsam reason per-process-limit Nov 25 15:31:27 ReportCrash[352] <Notice>: osa_update: Pid 361 'PacketTunnelApp' CORPSE: Extracting Nov 25 15:31:27 ReportCrash[352] <Notice>: osa_update: Pid 361 'PacketTunnelApp' CORPSE: Capture Complete Nov 25 15:31:27 ReportCrash[352] <Notice>: Formulating fatal report for corpse[361] PacketTunnelApp

the full log is : Nov 25 09:40:47 nesessionmanager[194] <Notice>: <NESMServer: 0x100a04550>: Register Enterprise VPN Session: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)] Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Successfully registered Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: status changed to connecting Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)] in state NESMVPNSessionStateIdle: received start message Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Leaving state NESMVPNSessionStateIdle Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Entering state NESMVPNSessionStatePreparingNetwork Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Leaving state NESMVPNSessionStatePreparingNetwork Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Entering state NESMVPNSessionStateStarting Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)] in state NESMVPNSessionStateStarting: plugin NEVPNTunnelPlugin(com.wangsu.securelink[inactive]) started with PID 0 error (null) Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Leaving state NESMVPNSessionStateStarting Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Entering state NESMVPNSessionStateStopping, timeout 20 seconds Nov 25 09:40:47 nesessionmanager[194] <Notice>: <NESMServer: 0x100a04550>: Request to uninstall session: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)] Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: status changed to disconnecting Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Updated network agent (inactive, compulsory, not-user-activiated, not-kernel-activated) Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Leaving state NESMVPNSessionStateStopping Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Entering state NESMVPNSessionStateDisposing, timeout 5 seconds Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)] in state NESMVPNSessionStateDisposing: plugin NEVPNTunnelPlugin(com.wangsu.securelink[inactive]) dispose complete Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)] in state NESMVPNSessionStateDisposing: all plugins have disposed Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Leaving state NESMVPNSessionStateDisposing Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: Entering state NESMVPNSessionStateIdle Nov 25 09:40:47 nesessionmanager[194] <Notice>: NESMVPNSession[Primary Tunnel:SecureLink:28390857-B967-4AC2-BEDC-8EC6198F0A43:(null)]: status changed to disconnected, last stop reason Plugin failed The iOS version is 14.0.1, and most of the device has this problem is 14.0.1