Nextcloud client problem in Tumbleweed Gnome

Hello! I have some problems in Tumbleweed Gnome, with Nextcloud client. It works and syncronize; but I cannot view its own window. When I select Nextcloud app, nothing happens. In other distributions, I can view Nextcloud window, with all the information and customizing options. Of course I can open my Nextcloud in the web browser; but I would like to use the app window, specially to check errors and similar. By the way, I am using wayland -could be that the problem? Thanks a lot for your help!

Any informations when you start it from a terminal?

I do not know the right command to start it from the terminal

When I just type “nextcloud” I can read:

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
nextcloud.gui.application: Already running, exiting…

When I enter with X11, I do not see that error in the terminal; but the app is not visible anyway