Cannot Download Trados 2021 because it was erased from my Licenses.

I changed the disk on my computer. I have had Trados Studio since 2017 and, up to now, I always saw that all of my licenses were in my account. I downloaded Trados Studio 2021, but all my licenses were erased from my account, except for 2022.

When I opened Trados Studio, I tried using the activation code from 2022, and it did not accept it. I Tried the Reset Activation Code option on the Activation box that opens up in the program, but it says the page cannot be reached.

Please help, I have urgent work to do and I need to be able to activate the 2021 version

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