Just for your information. This is another error when i m trying to rebuilt the project and call the openBrowser() method

[RemoteTestNG] detected TestNG version 6.9.6
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.testng.xml.XMLParser (file:/C:/Users/Cheong%20Kah%20Seng/.m2/repository/org/testng/testng/6.9.6/testng-6.9.6.jar) to constructor com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl()
WARNING: Please consider reporting this to the maintainers of org.testng.xml.XMLParser
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[TestNG] Running:
C:\Users\Cheong Kah Seng\AppData\Local\Temp\testng-eclipse--1965782299\testng-customsuite.xml

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
log4j:WARN No appenders could be found for logger (io.netty.util.internal.logging.InternalLoggerFactory).
log4j:WARN Please initialize the log4j system properly.
1604735023463 geckodriver INFO Listening on 127.0.0.1:33466
FAILED: testB
java.lang.NoSuchMethodError: 'void com.google.common.base.Throwables.throwIfUnchecked(java.lang.Throwable)'
at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:91)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:582)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:216)
at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:136)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:188)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:176)
at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:154)
at com.qtpselenium.core.ddf.base.BaseTest.openBrowser(BaseTest.java:13)
at com.qtpselenium.core.ddf.testcases.DummyTestB.testB(DummyTestB.java:12)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:639)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:821)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1131)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:124)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
at org.testng.TestRunner.privateRun(TestRunner.java:773)
at org.testng.TestRunner.run(TestRunner.java:623)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:357)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:352)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:310)
at org.testng.SuiteRunner.run(SuiteRunner.java:259)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1185)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1110)
at org.testng.TestNG.run(TestNG.java:1018)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:115)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

===============================================
Default test
Tests run: 1, Failures: 1, Skips: 0
===============================================

Both errors appeared to be the same even I rebuilt the project following the video provided

1) Please use TestNG 7.0

2) You can use selenium 6 beta

3) Make sure your testng.xml is correct

Is the following dependency selenium 6 beta? Or 4.0.0-alpha-6 considered as Selenium 6 beta? Because I notice there is a slightly different in the name of this selenium which is named as fluent-selenium

<!-- https://mvnrepository.com/artifact/org.seleniumhq.selenium.fluent/fluent-selenium -->
<dependency>
<groupId>org.seleniumhq.selenium.fluent</groupId>
<artifactId>fluent-selenium</artifactId>
<version>1.0-beta-6</version>
</dependency>

After just changing the testng, it still not working and the following is the output (Attachment available): 

<!-- https://mvnrepository.com/artifact/org.seleniumhq.selenium.fluent/fluent-selenium -->
<dependency>
<groupId>org.seleniumhq.selenium.fluent</groupId>
<artifactId>fluent-selenium</artifactId>
<version>1.0-beta-6</version>
</dependency>

After just changing the testng, it still not working and the following is the output (Attachment available): 

[RemoteTestNG] detected TestNG version 7.0.0
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
log4j:WARN No appenders could be found for logger (io.netty.util.internal.logging.InternalLoggerFactory).
log4j:WARN Please initialize the log4j system properly.
Starting ChromeDriver 86.0.4240.22 (398b0743353ff36fb1b82468f63a3a93b4e2e89e-refs/branch-heads/4240@{#378}) on port 26526
Only local connections are allowed.
Please see https://chromedriver.chromium.org/security-considerations for suggestions on keeping ChromeDriver safe.
ChromeDriver was started successfully.
FAILED: testB
java.lang.NoSuchMethodError: 'void com.google.common.base.Throwables.throwIfUnchecked(java.lang.Throwable)'
at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:91)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:582)
at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:216)
at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:136)
at org.openqa.selenium.chromium.ChromiumDriver.<init>(ChromiumDriver.java:75)
at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:163)
at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:150)
at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:105)
at com.qtpselenium.core.ddf.base.BaseTest.openBrowser(BaseTest.java:18)
at com.qtpselenium.core.ddf.testcases.DummyTestB.testB(DummyTestB.java:12)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:133)
at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:584)
at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:172)
at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:804)
at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:145)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at org.testng.TestRunner.privateRun(TestRunner.java:770)
at org.testng.TestRunner.run(TestRunner.java:591)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:402)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:396)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:355)
at org.testng.SuiteRunner.run(SuiteRunner.java:304)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1180)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1102)
at org.testng.TestNG.runSuites(TestNG.java:1032)
at org.testng.TestNG.run(TestNG.java:1000)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:115)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

===============================================
Default test
Tests run: 1, Failures: 1, Skips: 0
===============================================

===============================================
Default suite
Total tests run: 1, Passes: 0, Failures: 1, Skips: 0
===============================================

*Kindly Refer to the latest reply for the ammendment of my second last reply (with attachment)*

Thanks in advance

How have you imported the jar files of selenium?

It's okay already, thanks a lot