unable to access configure terminal in C1121X router

[ruch]

Hi All, 

We recently bought C1121(X) routers. however. we are unable to configure the router as the configure terminal command shows as not supported on the router. 

Cisco IOS XE Software, Version 16.12.03
Cisco IOS Software [Gibraltar], ISR Software (ARMV8EL_LINUX_IOSD-UCMK9-M), Version 16.12.3, RELEASE SOFTWARE (fc5)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2020 by Cisco Systems, Inc.

ROM: IOS-XE ROMMON

Any support would be much appreciated

[marce1000]

  - Post a screenshot of the command tried including the output , 

 M.