Gitlab Runner Test Fail 10/10

I'm little confused..

Default config `backstop init`.
Backstop Docker on both OS.

1. Windows 10 (Bash) -> Create Reference -> Test on Debian -> Pass 10/10
2. Debian 10 (SSH) -> Create Reference -> Test on Windows -> Pass 10/10
3. Windows 10 (Bash) -> Create Reference -> Gitlab -> Runner Shell (the same Debian 10 Server) -> Test -> Fail 10/10
4. Runner Shell -> Create Reference -> Windows 10 -> Test -> Fail 10/10

```
gitlab-runner -v
Version: 14.5.2
Git revision: e91107dd
Git branch: 14-5-stable
GO version: go1.13.8
Built: 2021-12-10T17:03:25+0000
OS/Arch: linux/amd64
```

```
docker run --rm -v ${PWD}:/src backstopjs/backstopjs --version
BackstopJS v5.3.5
```