You will see that is it NOT an active tab. You have to first click on the Blocked Tab FIRST. Then click on the Allowed TAB.
You don't need to click on the 'Blocked' tab first, just click on the Active tab as Lagonda said in the first post. (just because you're mouse pointer doesn't change, does not mean that you can't click on it...)
as Lagonda later said:
despite Allowed tab is already selected, click it
Best if you try things first before laughing at someone as if they were stupid.
I did, but did you?
BTW, I wasn't laughing at you as if you were stupid, I was laughing because you spoke to Lagonda as if he was stupid.