Steps to replicate the issue (include links if applicable):
What happens?:
504
What should have happened instead?:
Tool should show
Software version (skip for WMF-hosted wikis like Wikipedia):
k8s php7.4 image
Other information (browser name/version, screenshots, etc.):
Stopped out of the blue, restarted as php7.3, then as php7.4 several times, no effect.