Couchbase lite: Got LiteCore error: WebSocket error 404 Object Not Found

Ok, I fixed POSIX error 61. That was due to not running Sync gateway. I run sync gateway now and also iOS app. It says the following error in Xcode console:
2019-05-13 14:12:59.481387-0500 EventDrivenPattern[67725:1024421] CouchbaseLite Replicator ERROR: {Repl#2} Got LiteCore error: WebSocket error 404 "Not Found"

Looks like the error is “Database not found”. Because, sync gateway shows "2019-05-13T14:12:59.475-05:00 [INF] HTTP: #001: --> 404 no such database “eventdriven” (0.5 ms)
"
I would like to know what is the database name here? Is it already available in console ? Is it name of cluster? Can i give new name here?