ViaConstructor - Free and Opensource CAM for Linux and Mac

For X on Wayland you can try one of these depending on the gui toolkit you are using:
export PYOPENGL_PLATFORM="x11"
export GDK_BACKEND="x11"
export QT_QPA_PLATFORM="xcb"
 

could you tell me where should i put it?

Enter the command in a terminal prior to running ViaConstructor.

ViaConstructor is Qt so you may only require the QT.. command.

when i type it i get this message.
ViaConstructor opens but still not working properly

QStandardPaths: runtime directory '/run/user/1000' is not owned by UID 0, but a directory permissions 0700 owned by UID 1000 GID 1000
Error creating proxy: The connection is closed (g-io-error-quark, 18)

(viaconstructor:1826): dconf-WARNING **: 05:11:16.564: failed to commit changes to dconf: The connection is closed

 

That looks to me like you are trying to run it as the root user, you should normally run applications as a normal user.

Yes you are right. I run as root.
when I enter as a user, the messages do not appear, but the 3d visualization still does not work