Issue with running Gemini processor

[rajeshsoni94]

java.lang.NoClassDefFoundError: dev/langchain4j/model/chat/ChatLanguageModel

at com.t4a.transform.GeminiV2PromptTransformer.getJSONResponseFromAI(GeminiV2PromptTransformer.java:45)
at com.t4a.transform.PromptTransformer.transformIntoPojo(PromptTransformer.java:43)
at com.t4a.transform.PromptTransformer.transformIntoPojo(PromptTransformer.java:23)
at com.t4a.processor.selenium.SeleniumProcessor.processWebAction(SeleniumProcessor.java:17)
at UITestEx.testdemo(UITestEx.java:19)
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)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.testng.internal.invokers.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:141)
at org.testng.internal.invokers.TestInvoker.invokeMethod(TestInvoker.java:686)
at org.testng.internal.invokers.TestInvoker.invokeTestMethod(TestInvoker.java:230)
at org.testng.internal.invokers.MethodRunner.runInSequence(MethodRunner.java:63)
at org.testng.internal.invokers.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:992)
at org.testng.internal.invokers.TestInvoker.invokeTestMethods(TestInvoker.java:203)
at org.testng.internal.invokers.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:154)
at org.testng.internal.invokers.TestMethodWorker.run(TestMethodWorker.java:134)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at org.testng.TestRunner.privateRun(TestRunner.java:739)
at org.testng.TestRunner.run(TestRunner.java:614)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:421)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:413)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:373)
at org.testng.SuiteRunner.run(SuiteRunner.java:312)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:95)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1274)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1208)
at org.testng.TestNG.runSuites(TestNG.java:1112)
at org.testng.TestNG.run(TestNG.java:1079)
at com.intellij.rt.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:65)
at com.intellij.rt.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:105)

Caused by: java.lang.ClassNotFoundException: dev.langchain4j.model.chat.ChatLanguageModel
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:520)
... 32 more

Could you please help.