When launching the Add-in it just shows me a blank dialog with an error indicator in the top left corner
Published: 2019-04-15 by Mike.
This can be caused by Internet Explorer not set to run in Protected Mode. The other issue that can cause this is that you are running a very out of date version of Windows or Internet Explorer.
To enable Protected Mode:
- In Internet Explorer, click the Tools button, and then click Internet Options.
- Click the Security tab, and then select the Internet Sites Zone.
- Select the Enable Protected Mode check box.
- Select the Restricted Zone and select the Enable Protected Mode check box, and then click OK.
- Restart your computer.
If this problem persists update Windows to the latest version and make sure you have installed all updates.