Follow below Steps:- 1: Ensure that the correct Cucumber dependencies are added to your project. 2: Ensure that your build tool (Maven/Gradle) has downloaded the required libraries and added them to the classpath 3. If you are using additional libraries (e.g., Gherkin), ensure they are compatible with the Cucumber version 4. Sometimes, stale or corrupted files in the target or build directory can cause issues 5. If the issue occurs at runtime, ensure the library is bundled correctly or accessible in the environment where the application is running 6: Verify IDE Configuration: If you're using an IDE like IntelliJ IDEA or Eclipse: