I have been getting this error for a while now and am not able to open any windows app. This error appeared out of no where and is affecting every windows app with no solution. I can't even move the windowsapp folder due to added permissions so any help will be appreciated.
I'm seeing the same issue and did get one reply to my post about this earlier this year. It's a workaround at best and I'm still hoping for a fix from Microsoft to address this, but in the meantime, this may be helpful.