Control-plane connect rejected: INVALID_REQUEST protocol mismatch

[tgey]

Summary

Control-plane connect rejected: INVALID_REQUEST protocol mismatch

Not able to connect to the gateway

Steps to reproduce

1. openclaw gateway --port 18789
2. cd openclaw-studio & npm run dev

Expected

Connecting to the OpenClaw Gateway.

Actual

Compiling / ...
GET / 200 in 6.5s (compile: 6.3s, render: 235ms)
GET /api/runtime/stream 503 in 2.8s (compile: 2.2s, render: 575ms)
GET /api/studio 200 in 3.9s (compile: 2.2s, render: 1668ms)
GET /api/studio 200 in 4.1s (compile: 2.2s, render: 1874ms)
GET /api/runtime/summary 200 in 530ms (compile: 502ms, render: 27ms)
POST /api/studio/test-connection 200 in 1390ms (compile: 1342ms, render: 47ms)

Environment

• OS: Ubuntu 24.04
• Node: 22.2.2
• UI version/commit:
• Gateway running? (yes/no) yes

Logs/screenshots