Cannot upload avatar on 3.7.1

[DHCrafty]

Description: Any user or admin cannot upload avatar on RC 3.7.1

Steps to reproduce:

1. Go to user 'My Account' section
2. Click on upload Avatar and choose image
3. Click Open and then Save

Expected behavior:

Avatar to upload and show as user's avatar.

Actual behavior:

Message that profile saved but when reload page it just goes back to default avatar.

Server Setup Information:

• Version of Rocket.Chat Server: 3.7.1
• Operating System: CentOS 7
• Deployment Method: tar
• Number of Running Instances: 1
• DB Replicaset Oplog: Enabled
• NodeJS Version: 12.14
• MongoDB Version: 4.0.20

Client Setup Information

• Desktop App or Browser Version: Desktop App
• Operating System: Windows 10

Additional context

Error on server is "Exception in setTimeout callback: TypeError: Cannot read property 'etag' of undefined at app/lib/server/functions/setUserAvatar.js:66:50 at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12) at packages/meteor.js:550:25 at runWithEnvironment (packages/meteor.js:1286:24)

Relevant logs:

[cprice-kgi]

integrating this should resolve your issue:
#18841