For those who want to roll back to previous Windows beta version: https://download.zotero.org/client/beta/8.0-beta.17+0748b0975/Zotero-8.0-beta.17+0748b0975_x64_setup.exe

Disable autoupdate: Go to Config Editor in Settings, set "app.update.auto" to false. When there's a fix, set this to true and check for new update.

It's a beta, so this kind of issue is expected.