Error as "frappe app is not installed" , on bench frappe get-untranslated command


I am getting error on bench frappe get-untranslated as below on Version 10

Please help

frappe@erpnext:~/frappe-bench$ bench frappe get-untranslated ar ./ar.txt frappe app is not installed. Run the following command to install frappe
bench get-app GitHub - frappe/frappe: Low code web framework for real world applications, in Python and Javascript
Traceback (most recent call last):
File “/usr/local/bin/bench”, line 9, in
load_entry_point(‘bench’, ‘console_scripts’, ‘bench’)()
File “/home/frappe/bench-repo/bench/”, line 20, in cli
return old_frappe_cli()
File “/home/frappe/bench-repo/bench/”, line 80, in old_frappe_cli
os.execv(f, [f] + sys.argv[2:])
OSError: [Errno 2] No such file or directory