Fetch extension fails with "Unknown scheme for proxy URL URL('socks://127.0.0.1:2080/')"

Describe the bug
I installed https://github.com/block/goose/ cli and use ollama to manage a local LLM.
Adding fetch extension worked fine.
I tried both uvx mcp-server-fetch and uvx mcp-server-fetch --ignore-robots-txt to run extension.
Either way fetching any url ends up with Unknown scheme for proxy URL URL('socks://127.0.0.1:2080/'). This is somehow marked as "status":"success" in the tool result.

To Reproduce
Steps to reproduce the behavior:

1. Install block/goose cli
2. Set up any llm provider
3. Install and add fetch extension
4. Run goose and ask something like this: "read this doc - https://block.github.io/goose/docs/tutorials/custom-extensions/"

Logs

{"role":"assistant","created":1741517422,"content":[{"type":"text","text":""},{"type":"toolRequest","id":"call_7jc59c1n","toolCall":{"status":"success","value":{"name":"mcp_server_fetch__fetch","arguments":{"max_length":2048,"url":"https://block.github.io/goose/docs/tutorials/custom-extensions/"}}}}]}
{"role":"user","created":1741517422,"content":[{"type":"toolResponse","id":"call_7jc59c1n","toolResult":{"status":"success","value":[{"type":"text","text":"Unknown scheme for proxy URL URL('socks://127.0.0.1:2080/')"}]}}]}

Expected behavior
It should return the web page's contents upon a correct call. It shouldn't return status: success if the page's content isn't available.

Additional context
Sometimes it does work: https://github.com/block/goose/issues/1329 . But I'm yet to witness it myself.

The reported entry point is uvx mcp-server-fetch; first reproduce the fetch extension failure with the proxy URL socks://127.0.0.1:2080/ and inspect the logged tool result. Done means the requested page is fetched successfully, or failures report a non-success status instead of returning status: success.