@romit In BAS 0, this is not a tab, but as it were, the initial page of the browser and it cannot be closed, only the following can be.
If 0 close it, then the stream itself closes as it were :)
The browser seems to be closed.
Can use these 2 actions, it will be similar when you want to end the thread.
But in this case, this is a bug with the site. So you can use Fail to give an error message. This action will end the current thread.
Screenshot_4.png