Your app is crashing. Here's the latest log:

Note: you are using a pure-JavaScript implementation of bcrypt.
While this implementation will work correctly, it is known to be
approximately three times slower than the native implementation.
In order to use the native implementation instead, run

  meteor npm install --save bcrypt

in the root directory of your application.
/home/ubuntu/.meteor/packages/meteor-tool/.1.8.1.hxkmow.p85rh++os.linux.x86_64+web.browser+web.browser.legacy+web.cordova/mt-os.linux.x86_64/dev_bundle/server-lib/node_modules/fibers/future.js:313
						throw(ex);
						^

MongoError: Unsupported OP_QUERY command: listIndexes. The client driver may require an upgrade. For more details see https://dochub.mongodb.org/core/legacy-opcode-removal
    at /home/ubuntu/.meteor/packages/npm-mongo/.3.1.2.1mso99y.qpux++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/mongodb-core/lib/connection/pool.js:581:63
    at authenticateStragglers (/home/ubuntu/.meteor/packages/npm-mongo/.3.1.2.1mso99y.qpux++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/mongodb-core/lib/connection/pool.js:504:16)
    at Connection.messageHandler (/home/ubuntu/.meteor/packages/npm-mongo/.3.1.2.1mso99y.qpux++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/mongodb-core/lib/connection/pool.js:540:5)
    at emitMessageHandler (/home/ubuntu/.meteor/packages/npm-mongo/.3.1.2.1mso99y.qpux++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/mongodb-core/lib/connection/connection.js:310:10)
    at TLSSocket.<anonymous> (/home/ubuntu/.meteor/packages/npm-mongo/.3.1.2.1mso99y.qpux++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/mongodb-core/lib/connection/connection.js:453:17)
    at emitOne (events.js:116:13)
    at TLSSocket.emit (events.js:211:7)
    at addChunk (_stream_readable.js:263:12)
    at readableAddChunk (_stream_readable.js:250:11)
    at TLSSocket.Readable.push (_stream_readable.js:208:10)
    at TLSWrap.onread (net.js:601:20)
Exited with code: 1
Your application is crashing. Waiting for file change.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
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=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.
=> Meteor 2.15 is available. Update this project with 'meteor update'.