Nightscout - Boot Error

Unable to connect to Mongo

{"stack":"Error: invalid schema, expected mongodb
at module.exports (C:\\home\\site\\wwwroot\
ode_modules\\mongodb\\lib\\url_parser.js:20:11)
at connect (C:\\home\\site\\wwwroot\
ode_modules\\mongodb\\lib\\mongo_client.js:176:16)
at Function.MongoClient.connect (C:\\home\\site\\wwwroot\
ode_modules\\mongodb\\lib\\mongo_client.js:109:3)
at connect_with_retry (C:\\home\\site\\wwwroot\\lib\\storage\\mongo-storage.js:31:28)
at maybe_connect (C:\\home\\site\\wwwroot\\lib\\storage\\mongo-storage.js:51:7)
at init (C:\\home\\site\\wwwroot\\lib\\storage\\mongo-storage.js:70:10)
at setupStorage (C:\\home\\site\\wwwroot\\lib\\bootevent.js:73:43)
at Object. (C:\\home\\site\\wwwroot\
ode_modules\\bootevent\\index.js:12:7)
at EventEmitter.saw.nest (C:\\home\\site\\wwwroot\
ode_modules\\bootevent\
ode_modules\\chainsaw\\index.js:86:12)
at Object.acquire (C:\\home\\site\\wwwroot\
ode_modules\\bootevent\\index.js:10:9)","message":"invalid schema, expected mongodb"}