web-ui in firefox fails to get servers: 500 error: Failed to read server list: Couldn't access platform storage: PermissionDenied

[gberche-orange]

Describe the bug

When running locally from the docker image, after adding a server manually, the server isn't showing up in the web ui.

The firefox network inspector shows a 500 error fpr GET servers

To Reproduce
Steps to reproduce the behavior:

1. docker run --rm -p 6274:6274 ghcr.io/modelcontextprotocol/inspector

2. add manually mcp server to https://playground.kyverno.io/mcp (both with sse and streameable-http transports)

Expected behavior
A clear and concise description of what you expected to happen.

Logs

Failed to read server list: Couldn't access platform storage: PermissionDenied

Caused by:
    PermissionDenied

Additional context

[gkovacs81]

I have the same problem when running the mcpinspector in a devcontainer.
Finally I was able to start with:

dbus-run-session -- bash -lc '
 printf "%s" "$KEYRING_PASSWORD" | gnome-keyring-daemon --unlock --components=secrets
 eval "$(gnome-keyring-daemon --start --components=secrets)"
 npx @modelcontextprotocol/inspector --web'

[gberche-orange]

thanks @gkovacs81 , any idea of how to apply your workaround when using the docker image ?

From the docker file, the execution command is wrapped into the mcp-inspector script, I'm not sure how to inject additional instructions you suggested

inspector/Dockerfile

Lines 52 to 54 in fb1b0cb

	# Default to the web UI; override the args to run --cli / --tui.
	ENTRYPOINT ["mcp-inspector"]
	CMD ["--web"]

[itaru2622]

The same error raised on google chrome 150.0.7871.186-1 on debian (host browser), when tested with inspector docker container version.
Not tested if work-around fixes my case, yet.