I tried a few different examples I found to get ignition on a Pi 4, and I can get most of it to work. However I have some projects that have a popup and won’t load.
There is a popup “Unable to pen window XXXXX”
with these details…
SerializationException: Error deserializing element “<c”
caused by NoClassDefFoundError: com/sun/java/swing/plaf/windows/WindowsTableHeaderUI
caused by ClassNotFoundException: com.sun.java.swing.plaf.windows.WindowsTableHeaderUI
Ignition v7.9.14 (b2020042813)
Java: Raspbian 11.0.8