Trouble starting Booster on Mac

[sechel]

I'm having trouble starting the Audiotool Booster on Mac:

.audiotool % java -jar booster-awt.jar                               
15:03:03.912 [main] WARN io.sentry.DefaultSentryClientFactory - No 'stacktrace.app.packages' was configured, this option is highly recommended as it affects stacktrace grouping and display on Sentry. See documentation: https://docs.sentry.io/clients/java/config/#in-application-stack-frames  
15:03:03.927 [main] WARN io.sentry.DefaultSentryClientFactory - No 'stacktrace.app.packages' was configured, this option is highly recommended as it affects stacktrace grouping and display on Sentry. See documentation: https://docs.sentry.io/clients/java/config/#in-application-stack-frames  
Redirecting com.audiotool.util.logging to SLF4j  
Exception in thread "main" java.lang.NoClassDefFoundError: defrac/lang/Supplier  
 at com.audiotool.booster.Booster.<clinit>(Unknown Source)  
Caused by: java.lang.ClassNotFoundException: defrac.lang.Supplier  
 at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)  
 at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)  
 at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)