When I use xstream I get an "No such field java.lang.Class.prices" error. What I must do the get it to work?

message             : No such field java.lang.Class.prices
field               : prices
class               : com.sm.a.domainhosting.domain.PriceList
required-type       : com.sm.a.domainhosting.domain.PriceList
converter-type      : com.thoughtworks.xstream.converters.reflection.ReflectionConverter
path                : /priceList/prices
line number         : 3
version             : 1.4.19
-------------------------------
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.handleUnknownField(AbstractReflectionConverter.java:520)
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:371)
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:277)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:74)
    at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:72)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:68)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:52)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:136)
    at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
    at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1421)
    at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1399)
    at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1337)
    at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1326)
    at com.sm.a.domainhosting.GreetingResource.hello(GreetingResource.java:147)
    at com.sm.a.domainhosting.GreetingResource_Subclass.hello$$superforward1(Unknown Source)
    at com.sm.a.domainhosting.GreetingResource_Subclass$$function$$1.apply(Unknown Source)
    at io.quarkus.arc.impl.AroundInvokeInvocationContext.proceed(AroundInvokeInvocationContext.java:54)
    at io.quarkus.arc.runtime.devconsole.InvocationInterceptor.proceed(InvocationInterceptor.java:62)
    at io.quarkus.arc.runtime.devconsole.InvocationInterceptor.monitor(InvocationInterceptor.java:49)
    at io.quarkus.arc.runtime.devconsole.InvocationInterceptor_Bean.intercept(Unknown Source)
    at io.quarkus.arc.impl.InterceptorInvocation.invoke(InterceptorInvocation.java:41)
    at io.quarkus.arc.impl.AroundInvokeInvocationContext.perform(AroundInvokeInvocationContext.java:41)
    at io.quarkus.arc.impl.InvocationContexts.performAroundInvoke(InvocationContexts.java:32)
    at com.sm.a.domainhosting.GreetingResource_Subclass.hello(Unknown Source)
    at com.sm.a.domainhosting.GreetingResource$quarkusrestinvoker$hello_e747664148511e1e5212d3e0f4b40d45c56ab8a1.invoke(Unknown Source)
    at org.jboss.resteasy.reactive.server.handlers.InvocationHandler.handle(InvocationHandler.java:29)
    at org.jboss.resteasy.reactive.server.handlers.InvocationHandler.handle(InvocationHandler.java:7)
    at org.jboss.resteasy.reactive.common.core.AbstractResteasyReactiveContext.run(AbstractResteasyReactiveContext.java:141)
    at io.quarkus.vertx.core.runtime.VertxCoreRecorder$14.runWith(VertxCoreRecorder.java:548)
    at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2449)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1478)
    at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:29)
    at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:29)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.base/java.lang.Thread.run(Thread.java:829)