langgraph-cli dev error : Top-level await is currently not supported with the "cjs" output format

[jhau]

Hi
When I tried running the langgraph-cli dev command, I get the following error,

info: ▪ Starting server...
info: ▪ Initializing storage...
info: ▪ Registering graphs from /Users/jeff/work/ai-chat/open-mcp-client/agent-ts
info: ┏ Registering graph with id 'sample_agent'
info: ┗ [1] { graph_id: 'sample_agent' }
error: ▪ Error: Transform failed with 1 error:
/Users/jeff/work/ai-chat/open-mcp-client/node_modules/.pnpm/pkce-challenge@4.1.0/node_modules/pkce-challenge/dist/index.node.js:5:9: ERROR: Top-level await is currently not supported with the "cjs" output format

The pkce-challenge package is a dependency of :

@langchain/mcp-adapters 0.3.3
└─┬ @modelcontextprotocol/sdk 1.7.0
└── pkce-challenge 4.1.0

Any help on resolving this issue is much appreciated!