Could not create or update the launch configuration .vscode/launch.json

I've tried to follow the guide and follow the demo in .conf22 DEV1385C but got the issue while debug in container instance

Traceback (most recent call last):
  File "/opt/splunk/etc/apps/SA-VSCode/bin/splunk_debug.py", line 46, in enable_debugging
    _debug_config.create_or_update_launch_json(filepath, port)
  File "/opt/splunk/etc/apps/SA-VSCode/bin/_debug_config.py", line 35, in create_or_update_launch_json
    _create_vscode_launch_config(vscode_launch_file, port)
  File "/opt/splunk/etc/apps/SA-VSCode/bin/_debug_config.py", line 123, in _create_vscode_launch_config
    _write_vscode_launch_config(vscode_launch_file, main)
  File "/opt/splunk/etc/apps/SA-VSCode/bin/_debug_config.py", line 149, in _write_vscode_launch_config
    os.chmod(vscode_launch_file, 0o644)
PermissionError: [Errno 1] Operation not permitted: '/opt/splunk/etc/apps/TA-custom-alerting/.vscode/launch.json'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/opt/splunk/etc/apps/TA-custom-alerting/bin/telegram.py", line 21, in <module>
    dbg.enable_debugging(timeout=25)
  File "/opt/splunk/etc/apps/SA-VSCode/bin/splunk_debug.py", line 48, in enable_debugging
    raise Exception("Could not create or update the launch configuration: {}".format(e))
Exception: Could not create or update the launch configuration: [Errno 1] Operation not permitted: '/opt/splunk/etc/apps/TA-custom-alerting/.vscode/launch.json'

Current folder permission

total 120K
drwx------  7 splunk splunk 4.0K May 16 10:01 SA-VSCode
drwxr-xr-x  4 splunk splunk 4.0K Jan 20 22:40 SplunkForwarder
drwxr-xr-x  4 splunk splunk 4.0K Jan 20 22:40 SplunkLightForwarder
drwxrwxrwx  1 root   root   4.0K May 16 10:12 TA-custom-alerting

[ansible@splunk TA-custom-alerting]$ ls -lah
total 12K
drwxrwxrwx  1 root   root   4.0K May 16 10:12 .
drwxr-xr-x 31 splunk splunk 4.0K May 16 10:01 ..
drwxrwxrwx  1 root   root   4.0K May 16 10:12 .vscode
-rwxrwxrwx  1 root   root      0 May 16 09:59 LICENSE.txt
-rwxrwxrwx  1 root   root   3.9K May 16 09:59 README.md
-rwxrwxrwx  1 root   root     11 May 16 09:59 VERSION
drwxrwxrwx  1 root   root   4.0K May 16 09:59 ansible-tower-demo
-rwxrwxrwx  1 root   root   1.5K May 16 09:59 app.manifest
drwxrwxrwx  1 root   root   4.0K May 16 09:59 appserver
drwxrwxrwx  1 root   root   4.0K May 16 09:59 bin
drwxrwxrwx  1 root   root   4.0K May 16 09:59 default
drwxrwxrwx  1 root   root   4.0K May 16 10:12 lib
drwxrwxrwx  1 root   root   4.0K May 16 09:59 lookups
drwxrwxrwx  1 root   root   4.0K May 16 09:59 metadata
drwxrwxrwx  1 root   root   4.0K May 16 09:59 static

I've tried to uninstall/install with no success. Kindly advise.

Start with bin/splunk_debug.py and bin/_debug_config.py, especially create_or_update_launch_json and the _write_vscode_launch_config call shown in the traceback. Reproduce the container debugging flow against /opt/splunk/etc/apps/TA-custom-alerting/.vscode/launch.json and verify that the launch configuration can be created or updated without the reported PermissionError.