Can't reach Mongo Atlas when working from localhost (but it works when using the cloud)

[icepaco]

I use the exact same codebase. When I launch my app via Google Cloud Run everything works fine.
But when I laucnh locally from localhost I get this error :

Error connecting to MongoDB: Invalid uri: , connect: A socket operation was attempted to an unreachable network

Note : Localhost was working fine a couple months ago
Any idea what could've happened to effect this change / bug ?