Error log files for desktop client


where can I find log files for the (linux) desktop synchronisation clients?


in Linux, you can run the client:
nextcloud --logwindow

That link is dead.
Try Appendix C: Troubleshooting — Nextcloud Client Manual 3.5.4 documentation
The short answer seems to be that there are no text logs (But they can be configured) .
You need to use the log window in the desktop app.