PDF preview not working

[plmorpheus]

Description:

None of preview of attached pfd are showing.

Steps to reproduce:

1. Open desired channel
2. Add pdf as attachment
3. Click send

Expected behavior:

After upload the pdf's preview should appear.

Actual behavior:

Nothing happened, the file uploads but loading circle is infinitely appearing.

Server Setup Information:

• Version of Rocket.Chat Server: 3.6.2
• Operating System: Ubuntu
• Deployment Method: snap
• Number of Running Instances: 1
• DB Replicaset Oplog:
• NodeJS Version: 12.16.1
• MongoDB Version: 3.6.14

Client Setup Information

• Desktop App or Browser Version: Chrome 85.0.4183.121 / Windows Desktop App ver. 2.17.9
• Operating System: Windows

Additional context

In server logs there is no any errors.

Relevant logs:

Browser's console:
Uncaught (in promise) Error: /node_modules/pdfjs-dist/build/pdf.js:23 Uncaught (in promise) Error:
Removed API method: PDFDocumentLoadingTask.then, use the promise getter instead.
at r.then (/node_modules/pdfjs-dist/build/pdf.js:23)

[ankar84]

Hello, @plmorpheus
That issue was fixed in 3.7.0-rc.0 via #18956
You need to upgrade to 3.7.0-rc.1 or wait until release 3.7.0.

[sampaiodiego]

the fix is also on 3.6.3