I get this error when I run this command

twrp$ lunch omni_find7op-eng

build/core/product_config.mk:234: *** Can not locate config makefile for product "omni_find7op".  Stop.
Traceback (most recent call last):
  File "build/tools/roomservice.py", line 353, in <module>
    fetch_device(device)
  File "build/tools/roomservice.py", line 319, in fetch_device
    if check_device_exists(device):
  File "build/tools/roomservice.py", line 312, in check_device_exists
    location = parse_device_from_folder(device)
  File "build/tools/roomservice.py", line 194, in parse_device_from_folder
    for sub_folder in os.listdir("device"):
OSError: [Errno 2] No such file or directory: 'device'
build/core/product_config.mk:234: *** Can not locate config makefile for product "omni_find7op".  Stop.

** Don't have a product spec for: 'omni_find7op'
** Do you have the right repo manifest?