As of 0.13.30+, vaults on network locations that aren’t mounted as network drives don’t work anymore
So instead you have to mount as a network drive (with a drive letter), and it should work again.
Otherwise, remove obsidian from program files, and the AppData folders associated with it, reinstall 0.13.23, and turn off auto updates. Kinda annoying, as now obsidian takes up an entire drive letter on my pc, when previously I could point to a network location in the address bar above, but it’s the only working solution I could come up with.