Nextcloud Client on Mac Sonoma 14.1.1

I tried to install Nextcloud Client 3.10.1 on a Mac with Sonoma 14.1.1, but after installation, I can’t start the client: it opens up a window which says “1 account was detected from a legacy desktop client. Should the account be imported?”

But both options, “Skip” or “Import”, seems not to work. After clicking the one or the other button, the app closes completely.

Have you and ever a prior installation of the client?

You can find your config files here if so:
https://docs.nextcloud.com/desktop/3.11/advancedusage.html#configuration-file

The inability to start regardless of which option you choose sounds like a bug. But there’s a difference between a bug related to a prior installation versus something triggering the client to think you had a prior installation (if you did not).

I would check the repository for an existing report of a similar bug and report it if necessary.