This issue might happen when the pop-up blocker for the browser is on and user didn’t add AGORA into the exemption list. Below is the step on how to do setting for pop-up blocker.


How to set compatibility view in Microsoft Internet Explorer?
https://agorahelpdesk.freshdesk.com/solution/articles/29000004023-how-to-set-compatibility-view-in-microsoft-internet-explorer-

How to disable popup blocker in Microsoft Internet Explorer?
https://agorahelpdesk.freshdesk.com/solution/articles/29000004024-how-to-disable-popup-blocker-in-microsoft-internet-explorer-