No MCP servers work, local or remote.

[rublev]

Tried with npx, full paths, pnpm's dlx, etc, no avail. Any ideas? Can't get any MCP servers working at all.

context7

WARNING: Using default CLIENT_IP_ENCRYPTION_KEY.
Context7 Documentation MCP Server v2.1.0 running on stdio
JSON Parse error: Unrecognized token '�'

linear

[66143] Using existing client port: 22227

[66143] Discovering OAuth server configuration...
[66143] [66143] Connecting to remote server: https://mcp.linear.app/mcp
[66143] Using transport strategy: http-first
[66143] Connected to remote server using StreamableHTTPClientTransport
[66143] Local STDIO server running
[66143] Proxy established successfully between local STDIO and remote StreamableHTTPClientTransport
[66143] Press Ctrl+C to exit
[66143] [Local→Remote] initialize
[66143] {
  "jsonrpc": "2.0",
  "id": 0,
  "method": "initialize",
  "params": {
    "protocolVersion": "2025-11-25",
    "capabilities": {},
    "clientInfo": {
      "name": "mcp-client-cli (via mcp-remote 0.1.36)",
      "version": "1.0.0"
    }
  }
}
[66143] [Remote→Local] 0
JSON Parse error: Unrecognized token  '�'

sometimes i get this output like when trying to make a manual mcp of linear with command npx and arguments -y https://mcp.linear.app/mcp