The base seed for edubuntu is desktop-gnome, not desktop. LP: #2019060.

debian/changelog

@@ -1,3 +1,9 @@
+livecd-rootfs (2.841) UNRELEASED; urgency=medium
+
+  * The base seed for edubuntu is desktop-gnome, not desktop.  LP: #2019060.
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Wed, 17 May 2023 23:48:12 -0700
+
 livecd-rootfs (2.840) mantic; urgency=medium
 
   * auto/config: switch ubuntucinnamon and ubuntu-unity builds to use add_task

live-build/auto/config

@@ -1162,7 +1162,7 @@ case $PROJECT:${SUBPROJECT:-} in
 	xubuntu:minimal)
 		;;
         edubuntu:*)
-		BASE_SEED='desktop'
+		BASE_SEED='desktop-gnome'
 		;;
 	*)
 		BASE_SEED='desktop'