NPM update causes problems about magic-mirror-demo HOT 2 OPEN

Short follow up: After rolling back the npm modules one by one I found that the upgrade of mongoose created the issue... version 4.4.19 works fine...the latest vertion 4.7.5 breaks the connection as described above...

When i run npm update mongoose
I think the error above might have something to so with the error i get when rolling back:

npm WARN deprecated [email protected]: Please use 2.2.16 or higher due to a regression in updateOne/Many upsertedId return

Rolled back and now mirror workes again.... Quote: "Dont fix something thats not broken"

from magic-mirror-demo.

UPDATE:///this breaks something else :(

Changing the connection string in server.js makes the problem go away (meaning I don't know if I broke anything else)

mongoose.connect(connectionString, {
useMongoClient: true,
});

from magic-mirror-demo.