[SOLVED] I get this error when working with jgritman / httpbuilder

I get this error when working with jgritman / httpbuilder

I am new to Groovy and following a tutorial. Any help would be much appreciated. I also was unsuccessful in using @Grab.

It is a Groovy project without Maven or Gradle.

I have researched and couldn't find a solution, and the tutorial is not updated.

Course: The Complete Apache Groovy Developer Course

import groovyx.net.http.RESTClient

String base = 'http://api.icndb.com'

def chuck = new RESTClient(base)
def params = [firstName: "Dan", lastName: "Vega"]

chuck.contentType = ContentType.JSON
chuck.get( path: '/jokes/random', query: params ) { response, json ->
    println response.status
    println json
}

Error

Caught: java.lang.NoClassDefFoundError: groovy/util/slurpersupport/GPathResult
java.lang.NoClassDefFoundError: groovy/util/slurpersupport/GPathResult
    at java.desktop/com.sun.beans.introspect.MethodInfo.get(MethodInfo.java:70)
    at java.desktop/com.sun.beans.introspect.ClassInfo.getMethods(ClassInfo.java:80)
    at groovyx.net.http.ParserRegistry.<init>(ParserRegistry.java:87)
    at groovyx.net.http.HTTPBuilder.<init>(HTTPBuilder.java:194)
    at groovyx.net.http.RESTClient.<init>(RESTClient.java:80)
    at com.thesamoanppprogrammer.practicegroovy.restapi.httpbuilder.todos.run(todos.groovy:7)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Caused by: java.lang.ClassNotFoundException: groovy.util.slurpersupport.GPathResult

Solution

starting from groovy 3.0 GPathResult moved to another package: groovy.xml.slurpersupport.GPathResult.

but according to error HTTPBuilder is looking for old package groovy.util.slurpersupport.GPathResult.

You have to downgrade groovy version, or upgrade HTTPBuilder