@BHAVIN-GUPT Hi. I am the developer of this extension. It might be being used on an invalid site defined by opera such as opera addons, settings, or new tab. You also have to manually change permissions if you want to use it on your search engine for the same reason. Also, if there is a part of a website that the flashlight cannot move to, turn it off while you need to see there. (Spent hours trying to fix that, but it is not by any means a simple fix.)