getting exception when starting in agent mode

[ohpoloha]

sorry, I'm new to this tool. I was trying to start in agent mode as attach did not work for me. However, got the exception below when starting in agent mode. How can I fix this? Thanks!

$ java -javaagent:target/recaf-2.21.13-J8-jar-with-dependencies.jar -jar target/recaf-2.21.13-J8-jar-with-dependencies.jar
00:27:45.926 [main] INFO : Recaf-2.21.13
00:27:45.929 [main] INFO : - Java: 18.0.2.1 (Java HotSpot(TM) 64-Bit Server VM)
00:27:45.931 [main] INFO : Starting as agent...
Exception in thread "main" java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:119)
        at java.base/java.lang.reflect.Method.invoke(Method.java:577)
        at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:491)
        at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:503)
Caused by: java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:119)
        at java.base/java.lang.reflect.Method.invoke(Method.java:577)
        at me.coley.recaf.Agent.agent(Agent.java:51)
        at me.coley.recaf.Agent.premain(Agent.java:27)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        ... 3 more
Caused by: java.lang.NoClassDefFoundError: javafx/concurrent/Task
        at me.coley.recaf.command.impl.Initializer.run(Initializer.java:60)
        at picocli.CommandLine.executeUserObject(CommandLine.java:1939)
        at picocli.CommandLine.access$1300(CommandLine.java:145)
        at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2358)
        at picocli.CommandLine$RunLast.handle(CommandLine.java:2352)
        at picocli.CommandLine$RunLast.handle(CommandLine.java:2314)
        at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2179)
        at picocli.CommandLine$RunLast.execute(CommandLine.java:2316)
        at picocli.CommandLine.execute(CommandLine.java:2078)
        at me.coley.recaf.Recaf.launch(Recaf.java:103)
        at me.coley.recaf.Recaf.agent(Recaf.java:73)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        ... 7 more
Caused by: java.lang.ClassNotFoundException: javafx.concurrent.Task
        at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:445)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
        ... 19 more
*** java.lang.instrument ASSERTION FAILED ***: "result" with message agent load/premain call failed at s\open\src\java.instrument\share\native\libinstrument\JPLISAgent.c line: 422
FATAL ERROR in native method: processing of -javaagent failed, processJavaStart failed

[Col-E]

Closing as 4.X is the only branch we're working on going forward. It has a much more lightweight agent attach mechanism.