private static AppiumDriver<MobileElement> driver;

public AppiumDriver<MobileElement> getDriver() throws IOException {
    if (PLATFORM_NAME.equals("Android")) {
       driver = new AndroidDriver<MobileElement>(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);
    } else if (PLATFORM_NAME.equals("iOS")) {
       driver = new IOSDriver<MobileElement>(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);
    }
    return driver;
}

    at Test.main(Test.java:8)" If I want to see the error message then I have to read the class file in order to determin what the error is and where it is located. I was able to reproduce the bug in a small and simple Java file. I noticed that the bug shows up when I declare the like, "HashMap<dataTypeA, dataTypeB> name = new HashMap<dataTypeC, dataTypeD>" Where dataType A - D could be any data type I want it to be. The bug only occors when dataTypeC is different from dataTypeA and or dataTypeD is differnt from dataTypeB.

<groupId>org.example</groupId>
<artifactId>appiumappcenter</artifactId>
<version>1.0-SNAPSHOT</version>

<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
</properties>

<dependencies>

<dependency>
    <groupId>org.testng</groupId>
    <artifactId>testng</artifactId>
    <version>6.14.3</version>
</dependency>

    <dependency>
        <groupId>com.microsoft.appcenter</groupId>
        <artifactId>appium-test-extension</artifactId>
        <version>1.5</version>
    </dependency>


</dependencies>

<repositories>
    <repository>
        <id>jcenter</id>
        <url>https://jcenter.bintray.com/</url>
    </repository>

</repositories>


<profiles>
<profile>
    <id>prepare-for-upload</id>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>3.2.0</version>
                <executions>
                    <execution>
                        <id>copy-dependencies</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>
                            <!-- configure the plugin here -->
                            <outputDirectory>${project.build.directory}/upload/dependency-jars/</outputDirectory>
                            <useRepositoryLayout>true</useRepositoryLayout>
                            <copyPom>true</copyPom>
                            <addParentPoms>true</addParentPoms>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-help-plugin</artifactId>
                <version>2.2</version>
                <executions>
                    <execution>
                        <id>generate-pom</id>
                        <phase>package</phase>
                        <goals>
                            <goal>effective-pom</goal>
                        </goals>
                        <configuration>
                            <output>${project.build.directory}/upload/pom.xml</output>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.6</version>
                <executions>
                    <execution>
                        <id>copy-testclasses</id>
                        <phase>package</phase>
                        <goals>
                            <goal>testResources</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${project.build.directory}/upload/test-classes</outputDirectory>
                            <resources>
                                <resource>
                                    <directory>
                                        ${project.build.testOutputDirectory}
                                    </directory>
                                </resource>
                            </resources>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</profile>
</profiles>