Bug with providing API key: `Error from /api/map:`

First of all, thank you for creating this feature!

I wanted to flag a bug that I came across specifically with the URL `ai.pydantic.dev`. I suspect the bug is related to how the API key is getting parsed.

**Situation:** I want full llms.txt, so I call this URL `https://llmstxt.firecrawl.dev/ai.pydantic.dev/full?FIRECRAWL_API_KEY=XXX`. I get error `Error from /api/map`.

- I can retrieve the llms.txt in the UI generator and via URL `https://llmstxt.firecrawl.dev/ai.pydantic.dev`
- I can trigger the `/full` path as well
- But it fails whenever I add the API key (to get the full version), and the UI fails as well.

I get the following error:
```
{"error":"Error from /api/map: "}
```