Error: Cannot convert argument to a ByteString because the character at index 31 has a value of 8776 which is greater than 255

[niknas]

Describe the bug
Using the Brave API search with latest Claude desktop app on MacOS give the error Error: Cannot convert argument to a ByteString because the character at index 31 has a value of 8776 which is greater than 255.

To Reproduce
Steps to reproduce the behavior:

1. Setup Brave MCP as described in https://github.com/modelcontextprotocol/servers/tree/main/src/brave-search
2. Restart Claude app
3. Enter prompt "Show me the top headlines from cnn.com"
4. Claude app tries to query but gets stuck as per screenshot

Expected behavior
A list of news articles from the Brave API search

Logs
If applicable, add logs to help explain your problem.
From the mcp.log file:
2024-12-11T14:53:58.158Z [info] Attempting to connect to MCP server brave-search... 2024-12-11T14:53:58.161Z [info] Attempting to connect to MCP server filesystem... 2024-12-11T14:53:58.169Z [info] Connected to MCP server brave-search! 2024-12-11T14:53:58.170Z [info] Connected to MCP server filesystem!
Additional context
Environment MacOS
System Version: macOS 15.2 (24C100)
Kernel Version: Darwin 24.2.0
Country Code: SE
Current Input Source: com.apple.keylayout.Swedish-Pro
Language Code: en
Locale: en_SE
Preferred Interface Languages: en-SE, sv-SE
Uses Metric System: Yes
Claude
Version 0.7.5 (0.7.5)
claude_desktop_config.json
{ "mcpServers": { "brave-search": { "command": "npx", "args": [ "-y", "@modelcontextprotocol/server-brave-search" ], "env": { "BRAVE_API_KEY": "*HIDDEN*" } }, "filesystem": { "command": "npx", "args": ["-y", "@modelcontextprotocol/server-filesystem", "/Users/*HIDDEN*/"] } } }