The license to buy the upgrade is suddenly gone

I purchased a license for cubase12pro to upgrade to 13pro. But after using it for more than ten days, the license suddenly showed that it was gone. The license shown in the account is also gone, so I can’t activate my software now, but the upgrade giveaway at that time is still there, and I have been upgrading all the way from 11. The search for officials failed to get any reply. I hope someone can help me with this, thanks.

Hi and welcome to the forum,

Please, get in touch with your local Steinberg support. Provide them your MySteinberg email address. They will inspect your account history and find it out.