I'm getting this on 2026.4.27 upgrade:
openclaw update
Updating OpenClaw...
Update Result: OK
Root: /usr/lib/node_modules/openclaw
Before: 2026.4.26
After: 2026.4.27
Total time: 92.91s
Updating plugins...
No plugin updates needed.
Completion cache update failed: Error: spawnSync /usr/bin/node ETIMEDOUT
Restarting service...
Gateway did not become healthy after restart.
Gateway version mismatch: expected 2026.4.27, running gateway reported unavailable.
Service runtime: status=running, state=active, pid=2077013, lastExit=0
Gateway port 18789 status: free.
Restart log: /root/.openclaw/logs/gateway-restart.log
Run `openclaw gateway status --deep` for details.
That doesn't look good. What does Completion cache update failed: Error: spawnSync /usr/bin/node ETIMEDOUT mean?