Fixed! Slack has fixed the issue with their file upload API that was affecting the widget. Thank you for your patience.
Posted Jul 27, 2018 - 13:11 PDT
Identified
Slack has confirmed the issue with their API and is working on a fix/workaround. Thank you again for your patience.
Posted Jul 27, 2018 - 12:11 PDT
Investigating
We're currently experiencing problems with file uploads from the chat widget that appear to be due to a problem with Slack's API. We're working with Slack to resolve the issue.
We will update as soon as we know more, thank you for your patience.