Issue Summary

When selecting a file to be attached to a card using OneDrive Power-up, nothing happens. The file isn't attached.

Steps to Reproduce

1. Install the One Drive PowerUp
2. Open a card
3. Click on the One Drive Power-up button on the card
4. Login to your account
5. Click on the Attach a File
6. Select the file you want to attach
7. Click on Select to add the file to the card

Expected Results

The file selected is attached to the card

Actual Results

The file isn't attached
(See console logs attached: 

Error in console: OneDrive picker did not send back a file)

Workaround

Attach the file from the computer using the attachment button on the card