If you get this error in Microsoft Project Server (PWA) while trying to export to excel.

“The active x control on which this feature depends could not be created”

To fix this error got to Internet Explorer.

1. Go to Tools -> Internet Options
2. Click on the Security tab
3. Click on Trusted Sites
4. Add Project Server Site to Trusted Sites (If already not added)
5. Click on the Custom Levels button
6. Set the security level to low
7. Scroll to the Active X controls and plug-ins section
8. Enable the option to download unsigned Active X objects
9. Click OK and OK again
10. Restart Internet Explorer

Also make sure you are using the latest internet explorer