WRN Waking up dead poll thread [HttpSynReqPoll]

I see this in the loolwsd logs when I try to view a document in my Nextcloud site

WRN Waking up dead poll thread [HttpSynReqPoll], started: false, finished: false| ./net/Socket.hpp:680

The nextcloud page ends up blank with no errors in the logs.

Any ideas?

This seems to be an issue in the latest build(s). 6.4.11.3 works, 6.4.13.1 does not.

Hrm, I installed via my package manager I think. Not sure how to downgrade.

@logart, if you open browser console, do you see any errors there?
Older versions are available as tagged Docker images: Docker Hub

Yes, I see this error:

bundle.js:1 Uncaught ReferenceError: Cursor is not defined
    at NewClass.initialize (bundle.js:1)
    at new NewClass (bundle.js:1)
    at Object.L.map (bundle.js:1)
    at bundle.js:1
    at bundle.js:1
    at bundle.js:1

This seems like the same issue:

This is now fixed, please update your packages.