As of now, there is no way to fix this issue through a setting or an update. The fix that will solve is to remove the registry key.

Web Remote Workplace Doesn't Work With IE 8
We recommend the following process to set your machine right.
Go to Manage Add-ons in the tools drop down in Internet Explorer to enable Terminal Services ActiveX Control. However, ActiveX control will not be found in the list. So, this will help:
- Go to Start menu in Windows, select Run, and type Regedit
- Find registry key: HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Ext \ Settings
- Find{7584c670-2274-4efb-b00b-d6aaba6d3850} and then remove it.
- Close Internet Explorer
- Run Remote Desktop Web Connection
You should feel a ray of light shining on you now.