workaround

kasmvnc/run.sh

@@ -2,10 +2,10 @@
 
 # Set non-interactive and configure timezone
 export DEBIAN_FRONTEND=noninteractive
-if [[ ! -f /etc/timezone ]]; then
-    echo "Etc/UTC" | sudo tee /etc/timezone
-    sudo dpkg-reconfigure -f noninteractive tzdata
-fi
+
+echo "tzdata tzdata/Areas select Etc" | sudo debconf-set-selections
+echo "tzdata tzdata/Zones/Etc select UTC" | sudo debconf-set-selections
+sudo DEBIAN_FRONTEND=noninteractive apt-get install -y tzdata
 
 # Check if desktop environment is installed
 if ! dpkg -s ${DESKTOP_ENVIRONMENT} &>/dev/null; then