Describe the bug When I want to send a picture to one of my contacts, I get the message:

Upload Failed
Feature not supported by XMPP Server

To Reproduce Steps to reproduce the behavior:

1. Go to the paper clip symbol
2. Click on Select Photo
3. Select Picture
4. See error

Expected behavior Picture should be uploaded and send to the server. The server (Prosody 0.11.5-1~buster6) is configured for HTTP upload and other clients like chat secure support the upload of files.

Desktop (please complete the following information):

• OS: macOS Catalina

Smartphone (please complete the following information):

• Device: iPhone10
• OS: iOS13.4.1