I was trying to look through the Demo project using the latest version of Ignition and the Demo gateway backup located on the Extra Downloads page. When I attempt to launch I get an error message saying
“Error Launching Application:
IOException: undefined StackMapTable
attribute (old archive format)”
What version of Ignition are you using?
I am using version 7.6.3 (b2013090513), but I ended up re-installing my VM and it resolved the issue
Similar issue happened when I built and tried to run a custom module with Ignition 7.7.0 beta4 in a Java 8 environment. See https://inductiveautomation.com/forum/viewtopic.php?f=92&t=12520&sid=c50ccae57a4d900499137268a2897e84