I have a dropbox folder of MD files that works great on one computer. that folder is synced. I go to a second computer and open the folder as vault and just get a blank screen.
From searching the forum I think this should work, but is not.
Are the two devices running different operating systems?
Could you try deleting the workspace file in .obsidian/workspace inside the vault on the device that’s not working? The workspace file contains metadata saving the position and status of your panes. Then quit and reopen Obsidian.
It ended up being a forward slash in one file (out of a thousand) that stopped Obsidian from loading! Hopefully that is a rare occurence and can be fixed in a future release!