All file attachments on Android Fail

I’m realitively new to Mattermost, and I couldn’t find anything about this on the forums here which matched up with my issue. Any assistance would be greatly appreciated.


I cannot attach any files through the app, however, through the web portal, everything works fine.
The Server is configured to allow attachments up to 50MB using Local file storage as a back end.

Troubleshooting Steps Taken

  1. Validated folder permission and Mattermost’s ability to write to the folder
  2. Validated uploads still work through the Web interface
  3. Attempted multiple file types through the app
    • .txt
    • .png
    • .pdf
    • .mp4

Environment Details

  • Mattermost Android App (from play store)
    • Android 9
    • App Version 1.28.0 (Build 268)
  • Server version 5.17.0 (Build 5.17.1)
    • On Ubuntu Server 16.04.5

Hiya @sololegends, that’s quite the weird issue. Could you let us know what happens when you try to attach files on the Android app? Any errors?

Similarly, when you mentioned that you :

Validated uploads still work through the Web interface

Do you mean uploads through the web client on your computer/machine, or via the web client in your mobile browser?

One more thing I wanted to confirm is, is there any Enterprise mobility management (EMM) tools on your device (like MobileIron for example)? Oh and do check if this is happening to anyone else in your workspace.