Open
Description
Version
4.15.1
Describe the bug
Same files that used to work perfectly in the Emulator of version 4.14.1, don't get uploaded anymore in 4.15.1 - 400 error code. The bot application's endpoint doesn't even get triggered for such request. Textual messages work fine though.
To Reproduce
Steps to reproduce the behavior:
- Run Bot Framework Emulator and initiate a conversation with your bot;
- Click on Attach button to pick a file locally, click "Open" to try to upload it;
- See error 400 for this POST request
Expected behavior
File should be sent to the bot successfully.
[bug]
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