Erro in /etc/inc/config.inc on line 154

Greetings list.

I have this error coming up in the upper of the page 

Warning: filemtime(): Stat failed for /conf/config.xml (errno=2 - No such
file or directory) in /etc/inc/config.inc on line 154

m0n0wall 1.3 

Hardware Compaq P3 733Mhz 128mb RAM

Interfaces :

xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500

         options=9<RXCSUM,VLAN_MTU>

         inet6 xxxx::xxxx:xxxx:xxxx:xxxx%xl0 prefixlen 64 scopeid 0x1

         ether 00:01:02:xx:xx:xx

         media: Ethernet autoselect (100baseTX <full-duplex>)

         status: active

fxp0: flags=9843<UP,BROADCAST,RUNNING,SIMPLEX,LINK0,MULTICAST> mtu 1500

         options=8<VLAN_MTU>

         inet 192.168.1.1 netmask 0xffff0000 broadcast 192.168.255.255

         inet6 xxxx::xxxx:xxxx:xxxx:xxxx%fxp0 prefixlen 64 scopeid 0x2

         inet 172.20.30.40 netmask 0xffffffff broadcast 172.20.30.40

         ether 00:02:a5:xx:xx:xx

         media: Ethernet autoselect (100baseTX <full-duplex>)

         status: active

enc0: flags=41<UP,RUNNING> mtu 1536

lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384

         inet 127.0.0.1 netmask 0xff000000

         inet6 ::1 prefixlen 128

         inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4

ng0: flags=88d1<UP,POINTOPOINT,RUNNING,NOARP,SIMPLEX,MULTICAST> mtu 1492

         inet6 fe80::201:2ff:fe9d:e34e%ng0 prefixlen 64 scopeid 0x5

       inet 41.xxx.xxx.xxx --> 62.xxx.xxx.xxx netmask 0xffffffff 

 

I see this error once system rebooted and never appear after that

Regards 

Mohammed