you can’t just migrate vray, you need to install properly the version compatible with 2026.
go to chao’s website, log in using your trimble account.
there, on the top, go to download, and all products. you’ll get the SU2026 compatible version.
once installed, I recommend a quick restart of your computer, and launch sketchup. it should have Vray installed and ready to contact CHao’s server.