Description:

I have enabled the SlackBridge to sync messages between Slack and RocketChat. Normally after an upgrade of RocketChat I run /slackbridge-import in the channels I am part of. So the messages are synced back.
After the upgrade to 0.66.1 from 0.65.2 I received the following message:
SlackBridge got an error while importing your messages at <channel>: RocketChat.SlackBridge.importMessages is not a function

Steps to reproduce:

1. Go to any channel that is synced with Slack
2. Type /slackbridge-import
3. Hit enter

Expected behavior:

It imports the messages from Slack that are not in RocketChat

Actual behavior:

Received the error:
SlackBridge got an error while importing your messages at <channel>: RocketChat.SlackBridge.importMessages is not a function

Server Setup Information:

• Version of Rocket.Chat Server: 0.66.1
• Operating System: CoreOS / Kubernetes
• Deployment Method: Kubernetes / Docker
• Number of Running Instances: 1
• DB Replicaset Oplog: false
• NodeJS Version: 8.11.3
• MongoDB Version: 2.1.19

Additional context

Relevant logs:

Exception while invoking method 'slashCommand' TypeError: RocketChat.SlackBridge.importMessages is not a function at Object.SlackBridgeImport [as callback] (/app/bundle/programs/server/packages/rocketchat_slackbridge.js:250:28) at Object._runningSlashCommand [as run] (/app/bundle/programs/server/packages/rocketchat_lib.js:1757:55) at MethodInvocation.slashCommand (/app/bundle/programs/server/packages/rocketchat_lib.js:1812:37) at MethodInvocation.methodsMap.(anonymous function) (/app/bundle/programs/server/packages/rocketchat_lib.js:2428:36) at MethodInvocation.methodMap.(anonymous function) (packages/rocketchat_monitoring.js:2731:30) at maybeAuditArgumentChecks (/app/bundle/programs/server/packages/ddp-server.js:1877:12) at DDP._CurrentMethodInvocation.withValue (/app/bundle/programs/server/packages/ddp-server.js:902:126) at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1186:12) at DDPServer._CurrentWriteFence.withValue (/app/bundle/programs/server/packages/ddp-server.js:902:98) at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1186:12) at Promise (/app/bundle/programs/server/packages/ddp-server.js:902:46) at new Promise (<anonymous>:null:null) at Session.method (/app/bundle/programs/server/packages/ddp-server.js:875:23) at /app/bundle/programs/server/packages/ddp-server.js:754:85