I've had this issue happen too, with Surfshark. Removed, reinstalled, still won't work. So I now use WireGuard with Surfshark's VPN profiles - a pain, but it works.
It's these little things that get you over time with Windows. Turned on my desktop the other day, blank screen. Rebooted, logged in, screen blanked out again. Turns out a Windows Update had knocked out the Radeon graphic drivers - download, reinstall, all working again. 30 minutes of work time wasted.
Switched on my Surface Pro last night - face login not working. Windows couldn't turn on the camera. On Microsoft's own hardware.
It's all these little things that make you sigh and think "Why do I do this?". Paper cuts.