Users can opt-out of the daily digest by changing the option in their user profile settings.
We changed the behaviour to be opt-in instead of out-out, as people did not wish to receive emails every day If your NodeBB does not do this, then consider upgrading.
I was upgraded nodeBB from 1.14.3 to 1.15.4 and see this when upgrading. Is this for some reason and can I enabled again, or it is incompatible with new nodeBB version?
You shouldn't need to start and enable NodeBB every time you reboot the server, once you've enable'd it once, it should come up again every time you reboot.
I am just using the standard NodeBB forum features, no crazy plugins that are meant to affect the notifications. The switch does not work, and digests are going out...