搭建l2TP服务器时，重新启动xl2tpd服务出现一下failed
root@hnc-virtual-machine:/# systemctl status xl2tpd.service
● xl2tpd.service - LSB: layer 2 tunelling protocol daemon
Loaded: loaded (/etc/init.d/xl2tpd; bad; vendor preset: enabled)
Active: failed (Result: exit-code) since 二 2022-07-05 15:37:35 CST; 10s ago
Docs: man:systemd-sysv-generator(8)
Process: 18959 ExecStop=/etc/init.d/xl2tpd stop (code=exited, status=0/SUCCESS)
Process: 20549 ExecStart=/etc/init.d/xl2tpd start (code=exited, status=1/FAILURE)
7月 05 15:37:35 hnc-virtual-machine systemd[1]: Starting LSB: layer 2 tunelling protocol daemon
7月 05 15:37:35 hnc-virtual-machine xl2tpd[20553]: Enabling IPsec SAref processing for L2TP transport mode SAs
7月 05 15:37:35 hnc-virtual-machine xl2tpd[20553]: IPsec SAref does not work with L2TP kernel mode yet, enabling force userspace=yes
7月 05 15:37:35 hnc-virtual-machine xl2tpd[20553]: parse_config: line 27: 'ip range' not valid in this context
7月 05 15:37:35 hnc-virtual-machine xl2tpd[20553]: init: Unable to load config file
7月 05 15:37:35 hnc-virtual-machine xl2tpd[20549]: Starting xl2tpd:
7月 05 15:37:35 hnc-virtual-machine systemd[1]: xl2tpd.service: Control process exited, code=exited status=1
7月 05 15:37:35 hnc-virtual-machine systemd[1]: Failed to start LSB: layer 2 tunelling protocol daemon.
7月 05 15:37:35 hnc-virtual-machine systemd[1]: xl2tpd.service: Unit entered failed state.
7月 05 15:37:35 hnc-virtual-machine systemd[1]: xl2tpd.service: Failed with result 'exit-code'.
这个是什么问题，怎么解决，希望能帮忙看一下，非常感谢