When I have encountered problems with Java and Archicad before I have found that removing all versions of java except the one recommended for that version of Archicad seems to work.
You can always upgrade Java again after the installation/activation.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11