Please follow this procedure as follows:
1. Open Internet Explorer.
2. Click on Tools > Internet Options.
3. Go to the Security tab.
4. Click on Custom level.
5. In the menu that opens, scroll to "Download unsigned ActiveX controls" and check the value selected is "Enable".
6. If not Enabled, select the check box to Enable this option.
7. Click on OK to validate and close the Settings window.