Plugged in the headset in for the first time last friday (4th June), and it went through some updates, including an update to the headset (not via steam vr). Since then, I'm getting H501: HVR_ERR_Interface_LoadCoreFailed. The last time I had used it (which would have been a couple of weeks prior) were fine.
I've just reported an issue and it's uploaded logs with trace No : 20210610195259