Issue Summary

When trying to add attachments via the Onedrive Power-Up, after selecting the attachment, nothing happens and the attachment doesn't get added to the card. 

Steps to Reproduce

1. Load the Onedrive Power-Up
2. Select file and click on attach 

Tested both using a normal browser and also on incognito and we could reproduce the issue.

Expected Results

The file should be attached 

Actual Results

After selecting the file via the Onedrive Modal, nothing happens and the file doesn't get attached.
 

Workaround

No workaround at the moment.