NextJS won't connect to MongoDB when built and put on a server

MongoDB Atlas
,
3

Solved.
In my case, Im deplying NextJS v14.0.2.
Downgrading packages
mongoose 8.3.4 → 8.1.0
mongodb 6.10.0 → 6.3.0
Solved the five days pain in the head.
NodeJS 12.13.0
Regards!