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IE stopped working on Grid in beta 4

See original GitHub issue

💥 Regression Report

RemoteWebDriver.get() throws an exception when used with IE on Grid. It started happening in beta 4. Beta 3 worked fine. IE still works fine when used directly, without Grid.

Last working Selenium version

Worked up to version: 4.0.0-beta-3

Stopped working in version: 4.0.0-beta-4

To Reproduce

Start Grid hub and node

java -jar selenium-server-4.0.0-beta-4.jar hub
java -jar selenium-server-4.0.0-beta-4.jar node

Execute a simple test

InternetExplorerOptions ieOptions = new InternetExplorerOptions();
WebDriver driver = new RemoteWebDriver(new URL("http://localhost:4444"), ieOptions);
driver.get("http://www.google.com");
driver.quit();

The exception is

Exception in thread "main" org.openqa.selenium.InvalidArgumentException: parameters property of command is not a valid JSON object
Build info: version: '4.0.0-beta-4', revision: '29f46d02dd'
System info: host: '...', ip: '...', os.name: 'Windows Server 2016', os.arch: 'amd64', os.version: '10.0', java.version: '11'
Driver info: org.openqa.selenium.remote.RemoteWebDriver
Command: [c8ce0e31-e678-4cd7-b453-7d2209c49105, get {url=http://www.google.com}]
Capabilities {acceptInsecureCerts: false, browserName: internet explorer, browserVersion: 11, javascriptEnabled: true, pageLoadStrategy: normal, platform: WINDOWS, platformName: WINDOWS, proxy: Proxy(), se:ieOptions: {browserAttachTimeout: 0, elementScrollBehavior: 0, enablePersistentHover: true, ie.browserCommandLineSwitches: , ie.edgechromium: false, ie.edgepath: , ie.ensureCleanSession: false, ie.fileUploadDialogTimeout: 3000, ie.forceCreateProcessApi: false, ignoreProtectedModeSettings: false, ignoreZoomSetting: false, initialBrowserUrl: http://localhost:26710/, nativeEvents: true, requireWindowFocus: false}, setWindowRect: true, strictFileInteractability: false, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unhandledPromptBehavior: dismiss and notify}
Session ID: c8ce0e31-e678-4cd7-b453-7d2209c49105
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at org.openqa.selenium.remote.codec.w3c.W3CHttpResponseCodec.createException(W3CHttpResponseCodec.java:200)
	at org.openqa.selenium.remote.codec.w3c.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:133)
	at org.openqa.selenium.remote.codec.w3c.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:53)
	at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:184)
	at org.openqa.selenium.remote.TracedCommandExecutor.execute(TracedCommandExecutor.java:39)
	at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:612)
	at org.openqa.selenium.remote.RemoteWebDriver.get(RemoteWebDriver.java:326)
	at test.Test.main(Test.java:14)

Environment

OS: Windows Browser: Internet Explorer Browser version: 11 Browser Driver version: IEDriver 3.150.1 Language Bindings version: Java 4.0.0-beta-4 Selenium Grid version (if applicable): 4.0.0-beta-4