DBeaver Import launch configuration does not work

I have installed Eclipse via flatpak v1.10.7 on Debian bullseye (v11.2) with KDE Plasma 5.20.5 and Linux kernel 5.10.

I am trying to setup DBeaver and follow [this guide](https://github.com/dbeaver/dbeaver/wiki/Develop-in-Eclipse#running-and-debugging-in-eclipse). But when it comes to "Import Launch Configurations", I cannot browse or select anything. I cannot even enter something into the text field "From directory".

When I download and use the plain Exclipse application from their website, this works fine.

So there seem to be something wrong in the flatpak.