White blank screen - can't open obsidian or the vaults

none of the existing advice helps
i have tons of data on obsidian how to i save them while the app does not open? I use mac and dropbox

It would be better to say what you have tried so far so we have a starting point.

There are a few things to try here from me and Whitenoise. Have you tried those?

If those suggestions don’t work, another thing you could do is make a new vault within Obsidian and then, outside of Obsidian, copy your files and folders into that using the Finder. Don’t copy the old vault’s .obsidian settings folder to the new vault for now.