without any specific bridge config
```
vyos@vyos# run show bridge vni
Traceback (most recent call last):
File "/usr/libexec/vyos/op_mode/bridge.py", line 288, in <module>
res = vyos.opmode.run(sys.modules[__name__])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/vyos/opmode.py", line 263, in run
res = func(**args)
^^^^^^^^^^^^
File "/usr/libexec/vyos/op_mode/bridge.py", line 253, in show_vni
bridge_vni = _get_raw_data_vni()
^^^^^^^^^^^^^^^^^^^
File "/usr/libexec/vyos/op_mode/bridge.py", line 61, in _get_raw_data_vni
json_data = cmd(f'bridge --json vni show')
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/vyos/utils/process.py", line 155, in cmd
raise OSError(code, feedback)
PermissionError: [Errno 1] failed to run command: bridge --json vni show
returned: [
exit code: 1
```
reproduced on:
```
VyOS 1.5-rolling-202409160007
VyOS 1.4-stable-202409170309
``