Meteor cant connect to mongodb server

I have meteor app A, and now I creating meteor app B

I want to connect to mongodb server used by A from B, but I got error

W20200508-16:40:34.289(7)? (STDERR) MongoNetworkError: failed to connect to server [] on first connect [Error: self signed certificate
W20200508-16:40:34.289(7)? (STDERR)     at TLSSocket.onConnectSecure (_tls_wrap.js:1473:34)
W20200508-16:40:34.289(7)? (STDERR)     at TLSSocket.emit (events.js:311:20)
W20200508-16:40:34.290(7)? (STDERR)     at TLSSocket.EventEmitter.emit (domain.js:482:12)
W20200508-16:40:34.301(7)? (STDERR)     at TLSSocket._finishInit (_tls_wrap.js:916:8)
W20200508-16:40:34.302(7)? (STDERR)     at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:686:12) {
W20200508-16:40:34.302(7)? (STDERR)   name: 'MongoNetworkError',
W20200508-16:40:34.303(7)? (STDERR)   [Symbol(mongoErrorContextSymbol)]: {}
W20200508-16:40:34.303(7)? (STDERR) }]

how to solve this?