Open as a vault and create a vault don't work

Things I have tried

Hello

I am trying to create a new vault using obsidian running on macOS Catalina. I had no problem to do the same on macOS High Sierra. I have installed the same dmg file on both Macs.

What I’m trying to do

On Catalina when I press Browse nothing helps. The wheel show up for an instance and that is it.

What could be wrong?

Many thanks

Ed