Couldn't connect mongodb to navicat

Cannot connect to MongoDB.
No suitable servers found: serverSelectionTimeoutMS expired: [connection refused calling ismaster on ‘localhost:27017’]

That’s happened with me on my site The Vlogging Tech which I am managing it from 6 month ago that’s problem with me since 3 days ago

That’s happened with me on my site speakerjournal which I am managing it from 6 month ago that’s problem with me since 3 days ago

That’s the same issue happened on my site speakerjournal I am managing it from 8 month ago that’s problem with me since 6 days ago