Add error message for wayland
This fixes issue #45 (closed) A window with an error message is now displayed when the user is under wayland.
GitLab upgrade completed. Current version is 18.3.6
https://about.gitlab.com/releases/2025/07/17/gitlab-18-2-released/
https://about.gitlab.com/releases/2025/08/21/gitlab-18-3-released/
This fixes issue #45 (closed) A window with an error message is now displayed when the user is under wayland.