In order for you to use the Restream Chat to its full potential, like using the click-through mode, automatic chat updates, and settings on the macOS version, you will need to grant the chat additional permissions.
Whenever you enable the click-through mode, you will be asked to grant permissions and set the system preference for Restream chat (make sure to grant it on the first try).
If you have denied the permissions, you can always set them manually.
Instructions
1) Head to your System Settings > Security and Privacy > Accessibility.
2) Toggle on Restream Chat.
Tip: If your chat does not show up there for some reason, click on the "+" sign and add it manually.