Pushing Reply button on broadcast channel returns Uncaught TypeError

[luixxiul]

Description:

Pushing reply button on a broadcast channel returns Uncaught TypeError at Object.click .js-reply-broadcast.

ff6013144504e3a59449ac19b5024e36e831a3a7.js?meteor_js_resource=true:299 Uncaught TypeError: Cannot read property 'u' of undefined
    at Object.click .js-reply-broadcast (ff6013144504e3a59449ac19b5024e36e831a3a7.js?meteor_js_resource=true:299)
    at ff6013144504e3a59449ac19b5024e36e831a3a7.js?meteor_js_resource=true:299
    at Function.t._withTemplateInstanceFunc (ff6013144504e3a59449ac19b5024e36e831a3a7.js?meteor_js_resource=true:299)
    at h.View.<anonymous> (ff6013144504e3a59449ac19b5024e36e831a3a7.js?meteor_js_resource=true:299)
    at ff6013144504e3a59449ac19b5024e36e831a3a7.js?meteor_js_resource=true:299
    at Object.h._withCurrentView (ff6013144504e3a59449ac19b5024e36e831a3a7.js?meteor_js_resource=true:299)
    at h._DOMRange.<anonymous> (ff6013144504e3a59449ac19b5024e36e831a3a7.js?meteor_js_resource=true:299)
    at HTMLButtonElement.delegatedHandler (ff6013144504e3a59449ac19b5024e36e831a3a7.js?meteor_js_resource=true:299)
    at HTMLDivElement.dispatch (ff6013144504e3a59449ac19b5024e36e831a3a7.js?meteor_js_resource=true:254)
    at HTMLDivElement.g.handle (ff6013144504e3a59449ac19b5024e36e831a3a7.js?meteor_js_resource=true:254)

Steps to reproduce:

1. Create a broadcast channel
2. Post something
3. Click Reply

Expected behavior:

There should an input form appear.

Actual behavior:

Please ignore the input box above the devtool as I took the gif with an authorized user.

Server Setup Information:

• Version of Rocket.Chat Server: 3.1.2
• Operating System: Debian 10
• Deployment Method: Docker
• Number of Running Instances: 1
• DB Replicaset Oplog: Enabled
• NodeJS Version: v12.16.1
• MongoDB Version: 4.0.17

Client Setup Information

• Desktop App or Browser Version: 2.7.17
• Operating System: Windows 10

Additional context

Relevant logs: