OpenShell+NemoClaw installed successfully, but in the webUI can't add a build in skill.

## Description

on horde Pro 6000.
Repro steps:
Step1: Install OpenShell from source code, details in https://github.com/nvidia/openshell
git clone https://github.com/NVIDIA/OpenShell.git
cd OpenShell
curl https://mise.run | sh
echo 'eval $(~/.local/bin/mise activate bash) ' >> ~/.bashrc
mise --version
source ~/.bashrc
mise trust
source .venv/bin/activate
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
. $HOME/.cargo/env
export GITHUB_TOKEN=ghp_xjn0y8eI8459PuEdpzGNVpEDbEEA721wm479x #fake key
mise install
openshell --version
Step2: Install NemoClaw from source code:
git clone https://github.com/NVIDIA/NemoClaw.git
cd NemoClaw
sudo apt update
sudo apt install powerman
npm install -g . # install NemoClaw from source code
nemoclaw my-assistant destroy --yes
nemoclaw onboard
OpenAI-compatible base URL: https://dashscope.aliyuncs.com/compatible-mode/v1
Other OpenAI-compatible endpoint API key: sk-09fb40a2da974db8b8a6a3cff1f323d9d #fake key
Other OpenAI-compatible endpoint with model: qwen-plus
#policy use discord,docker,huggingface,jira,npm,outlook,pypi,slack,telegram,feishu
OpenClaw UI (tokenized URL; treat it like a password)
Port 18789 must be forwarded before opening this URL.
http://127.0.0.1:18789/#token=eb8c6afe06a9098bf8de6f905445cf553adc8482896d3a6dda6bb26a42a6c4b6
openshell forward start 18789 my-assistant --background
nemoclaw my-assistant connect
#on your Mac, run ssh -L 18790:localhost:18789 horde@10.57.232.50 , and when open a address link this http://127.0.0.1:18789/#token=eb8c6afe06a9098bf8de6f905445cf553adc8482896d3a6dda6bb26a42a6c4b6
#the webUI is loaded successfully, then click to skills tab and load in a skill, it fails.

## Bug Details

| Field | Value |
|-------|-------|
| Priority | Unprioritized |
| Action | Dev - Open - To fix |
| Disposition | Open issue |
| Module | Machine Learning - NemoClaw |
| Engineer | Aaron Erickson |
| Requester | Thor Wu |
| Keyword | NemoClaw, NemoClaw_Agent&Skills |
| Days Open | 47 |

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[NVB#6040756]