Error retrieving a new session from the selenium server Connection refused! Is selenium server started?

18:39:17 [91m18:38:55[39m [1;31mError retrieving a new session from the selenium server[0m
18:39:17 [91m18:38:55[39m [0;31mConnection refused! Is selenium server started?
18:39:17 [91m18:38:55[39m [0m[0;90m{ sessionId: null,
18:39:17 [91m18:38:55[39m   state: 'unknown error',
18:39:17 [91m18:38:55[39m   hCode: 1427609829,
18:39:17 [91m18:38:55[39m   value:
18:39:17 [91m18:38:55[39m    { additionalInformation: 'nDriver info: driver.version: unknown',
18:39:17 [91m18:38:55[39m      localizedMessage: 'The best matching driver provider org.openqa.selenium.phantomjs.PhantomJSDriver can't create a new driver instance for Capabilities [{acceptSslCerts=true, marionette=true, name=Checkout /  Guest User Shoe Purchase Test, browserName=internet explorer, javascriptEnabled=true, platform=ANY}]nBuild info: version: '3.1.0', revision: '86a5d70', time: '2017-02-16 07:57:44 -0800'nSystem info: host: 'jenkins2.rsp.shoebuy.com', ip: '172.30.2.157', os.name: 'Linux', os.arch: 'amd64', os.version: '3.10.0-514.6.1.el7.x86_64', java.version: '1.8.0_121'nDriver info: driver.version: unknown',
18:39:17 [91m18:38:55[39m      systemInformation: 'System info: host: 'jenkins2.rsp.shoebuy.com', ip: '172.30.2.157', os.name: 'Linux', os.arch: 'amd64', os.version: '3.10.0-514.6.1.el7.x86_64', java.version: '1.8.0_121'',
18:39:17 [91m18:38:55[39m      supportUrl: null,
18:39:17 [91m18:38:55[39m      cause: null,
18:39:17 [91m18:38:55[39m      suppressed: [],
18:39:17 [91m18:38:55[39m      message: 'The best matching driver provider org.openqa.selenium.phantomjs.PhantomJSDriver can't create a new driver instance for Capabilities [{acceptSslCerts=true, marionette=true, name=Checkout /  Guest User Shoe Purchase Test, browserName=internet explorer, javascriptEnabled=true, platform=ANY}]nBuild info: version: '3.1.0', revision: '86a5d70', time: '2017-02-16 07:57:44 -0800'nSystem info: host: 'jenkins2.rsp.shoebuy.com', ip: '172.30.2.157', os.name: 'Linux', os.arch: 'amd64', os.version: '3.10.0-514.6.1.el7.x86_64', java.version: '1.8.0_121'nDriver info: driver.version: unknown',
18:39:17 [91m18:38:55[39m      hCode: 1616364689,
18:39:17 [91m18:38:55[39m      class: 'org.openqa.selenium.WebDriverException',
18:39:17 [91m18:38:55[39m      buildInformation:
18:39:17 [91m18:38:55[39m       { buildRevision: '86a5d70',
18:39:17 [91m18:38:55[39m         buildTime: '2017-02-16 07:57:44 -0800',
18:39:17 [91m18:38:55[39m         releaseLabel: '3.1.0',
18:39:17 [91m18:38:55[39m         hCode: 1603424763,
18:39:17 [91m18:38:55[39m         class: 'org.openqa.selenium.internal.BuildInfo' },
18:39:17 [91m18:38:55[39m      screen: null },
18:39:17 [91m18:38:55[39m   class: 'org.openqa.selenium.remote.Response',
18:39:17 [91m18:38:55[39m   status: 13 }[0m
18:39:17
18:39:17 [92m[INFO][39m [Magellan]
18:39:17 [92m[INFO][39m [Magellan] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

15:27:50.516 INFO - Executing: [find element: By.xpath: //div[contains(@class, '
sb-userbar')]//a[contains(text(), 'SIGN IN')]])
15:27:51.139 WARN - Exception thrown
org.openqa.selenium.NoSuchElementException: Unable to find element with xpath ==
 //div[contains(@class, 'sb-userbar')]//a[contains(text(), 'SIGN IN')]
For documentation on this error, please visit: http://seleniumhq.org/exceptions/
no_such_element.html
Build info: version: '3.4.0', revision: 'unknown', time: 'unknown'
System info: host: '101ARCH-VM4', ip: '169.254.67.254', os.name: 'Windows 7', os
.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_144'
Driver info: org.openqa.selenium.ie.InternetExplorerDriver
Capabilities [{acceptInsecureCerts=false, browserVersion=11, se:ieOptions={nativ
eEvents=true, browserAttachTimeout=0.0, ie.ensureCleanSession=false, elementScro
llBehavior=0.0, enablePersistentHover=true, ie.browserCommandLineSwitches=, ie.f
orceCreateProcessApi=false, requireWindowFocus=false, initialBrowserUrl=http://l
ocalhost:4911/, ignoreZoomSetting=false, ie.fileUploadDialogTimeout=3000.0, igno
reProtectedModeSettings=false}, browserName=internet explorer, pageLoadStrategy=
normal, unhandledPromptBehavior=dismiss, javascriptEnabled=true, platformName=wi
ndows, setWindowRect=true, platform=ANY}]