@wmario First see https://forums.opera.com/rules
Yes, as said in https://blogs.opera.com/desktop/2023/01/opera-windows-7-8/ and in https://blogs.opera.com/desktop/2023/02/opera-95-stable/, support for Windows 7 and 8 has ended a while ago.
If you want to install the current version of Opera, you need at least Windows 10.