Can not send image in chat

Description

Text-chatting is OK, but image-sending (PrintScreen & Ctrl V) is not working
What is the problem? How could I fix it

Server Setup Information

  • Version of Rocket.Chat Server: 1.0.3
  • Operating System: Ubuntu 16.04
  • Deployment Method: snap
  • Number of Running Instances: 1
  • DB Replicaset Oplog: not-sure
  • NodeJS Version: v8.11.3
  • MongoDB Version: 3.4.20
  • Proxy: caddy
  • Firewalls involved: no

Any additional Information

Checked in Administrations/File Upload/File Uploads Enabled in Direct Messages: True