If you are on nodebb 1.12.2 you should use the version of db search in your package.json. 4.0.6 is for nodebb 1.13.0 which isn't released yet.
How to install nodebb in mlab?
Is it possible to install nodebb in mlab?
Mongo lab? If they provide a mongo connection URI it should work...
I am new to nodebb and cloud. Here is the dashboard screenshot.
please give step by step procedure if possible. Thanks.
mlab is just a service for mongodb hosting, meaning, you can get a database instance to connect to, but you can't run (as far as I can tell) an arbitrary application in their cloud.