Getting java.lang.ClassCastException while trying to attach IntelliJ debugger

I followed the [instructions](https://github.com/JetBrains/attachme) to setup the AttachMe using port address 127.0.0.1, because of the a [problem](https://github.com/JetBrains/attachme#known-issues) with the bind address. Then I ran the Play application using `sbt start`. The AttachMe throws an exception:
```
AttachMe listening for debuggee processes on port 7857
java.lang.ClassCastException: class com.intellij.debugger.impl.attach.JavaAttachDebuggerProvider$ProcessAttachRunConfiguration cannot be cast to class com.attachme.plugin.AttachmeDebugger$ProcessAttachRunConfiguration (com.intellij.debugger.impl.attach.JavaAttachDebuggerProvider$ProcessAttachRunConfiguration is in unnamed module of loader com.intellij.ide.plugins.cl.PluginClassLoader @44774fa2; com.attachme.plugin.AttachmeDebugger$ProcessAttachRunConfiguration is in unnamed module of loader com.intellij.ide.plugins.cl.PluginClassLoader @1412d19c)
at com.attachme.plugin.AttachmeDebugger.attach(AttachmeDebugger.java:27)
at com.attachme.plugin.AttachmeRunner.onDebuggeeProcess(AttachmeRunner.java:59)
at com.attachme.plugin.AttachmeRunTask.runServer(AttachmeRunTask.java:67)
at com.attachme.plugin.AttachmeRunTask.run(AttachmeRunTask.java:39)
at java.base/java.lang.Thread.run(Thread.java:834)
```

What does cause to the exception? How to fix it?
Thank you!