I reinstalled Trados 2021 Studio and now can't lisence it

As Trados 2021 Studio was giving a lot of problems, I uninstalled it with Revo. I then re-installed it. It now asks for activation code, but when I enter the code from my SDL account, it says no codes are available. But I have been using the code for years. So not sure why it suddenly doesn't work. Can someone help?

Also, I have Studio Plus, so should have more than one activations, but my account only seems to have one. What is going on?

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