features.BasicString not found

[jmccrae]

java.lang.RuntimeException: Could not load service: features.BasicString
	at org.insightcentre.uld.naisc.util.Services.get(Services.java:20)
	at org.insightcentre.uld.naisc.main.Configuration.makeTextFeatures(Configuration.java:177)
	at org.insightcentre.uld.naisc.main.Main.execute(Main.java:284)
	at org.insightcentre.uld.naisc.main.Main.execute2(Main.java:188)
	at org.insightcentre.uld.naisc.meas.execution.ExecutionTask.run(ExecutionTask.java:77)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.lang.ClassNotFoundException: features.BasicString
	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:525)
	at java.base/java.lang.Class.forName0(Native Method)
	at java.base/java.lang.Class.forName(Class.java:375)
	at org.insightcentre.uld.naisc.util.Services.get(Services.java:18)
	... 5 more

Happens when running a configuration with no features