"Error executing tool test: object NoneType can't be used in 'await' expression"

Receiving this error when attempting to use `asyncio`'s `Context` at all in this test tool: 
```py
@mcp.tool()
async def test(message: str, ctx: Context = None) -> str:
    """Simple echo test function."""
    if ctx:
        await ctx.info(f"Echo test: {message}")
    return f"Echo: {message}"

```

I'm testing using `mcp-inspector` and on `fastmcp` v0.4.1. Anyone have any ideas? 