Error when running "Install colmap" in colab

I try to preprocess by my own data but got this issue:
/content/LLFF
Need to run COLMAP
Traceback (most recent call last):
File "imgs2poses.py", line 18, in
gen_poses(args.scenedir, args.match_type)
File "/content/LLFF/llff/poses/pose_utils.py", line 268, in gen_poses
run_colmap(basedir, match_type)
File "/content/LLFF/llff/poses/colmap_wrapper.py", line 35, in run_colmap
feat_output = ( subprocess.check_output(feature_extractor_args, universal_newlines=True) )
File "/usr/lib/python3.7/subprocess.py", line 411, in check_output
**kwargs).stdout
File "/usr/lib/python3.7/subprocess.py", line 488, in run
with Popen(*popenargs, **kwargs) as process:
File "/usr/lib/python3.7/subprocess.py", line 800, in __init__
restore_signals, start_new_session)
File "/usr/lib/python3.7/subprocess.py", line 1551, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'colmap': 'colmap'

Start with llff/poses/colmap_wrapper.py at the feature-extractor subprocess call and review the Colab step titled “Install colmap.” Reproduce the preprocessing command in Colab and confirm that the COLMAP executable is available and the traceback no longer occurs.

Written by the indexing model from the issue text.