WebDriverError: Could not start Browser / Emulator error - protractor

Question

Oflate , I have been observing below error when ran my protractor tests on browserstack.
"UnhandledPromiseRejectionWarning: WebDriverError: Could not start Browser / Emulator"
Here is my protractor config file.
let browserstack = _.defaults({
user: process.env.BROWSERSTACK_USERNAME,
key: process.env.BROWSERSTACK_ACCESS_KEY
}, {
user: '**',
key: '**'
});
let timeoutMultiplier = 2;
exports.makeDefaultCapabilities = function(that) {
return {
browserName: 'chrome',
chromeOptions: {
prefs: {
credentials_enable_service: false,
},
loggingPrefs: {
driver: 'WARNING',
server: 'WARNING',
browser: 'INFO'
},
'browserstack.user': browserstack.user,
'browserstack.key': browserstack.key,
'browserstack.debug': true,
build: that.params.BUILD_NUMBER || '(unknown)',
maxInstances: 2,
name: that.baseUrl,
}
};
exports.config = {
suites: {
e2e: [
'*/*.spec.js'
]
},
SELENIUM_PROMISE_MANAGER: false,
baseUrl: undefined,
framework: 'jasmine',
jasmineNodeOpts: {
defaultTimeoutInterval: 60 * 1000 * timeoutMultiplier,
realtimeFailure: true
},
maxSessions: 1,
params: {
BUILD_NUMBER: undefined,
CI: undefined,
TIMEOUT_MULTIPLIER: timeoutMultiplier
},
seleniumAddress: 'https://hub-cloud.browserstack.com/wd/hub',
useAllAngular2AppRoots: true,
getMultiCapabilities: function() {
return new Promise(function(resolve) {
let capabilities = [];
capabilities.push({
os: 'OS X',
os_version: 'High Sierra'
});
resolve(capabilities);
});
},
onPrepare: function() {
browser.manage().window().maximize();
jasmine.getEnv().addReporter(failFast.init());
let reporter = new SpecReporter();
jasmine.getEnv().addReporter(reporter);
}
};
Test that is failing :
calling function :
async clickButton() {
await browser.waitForAngularEnabled(false);
await waitForEl(this.Button);
await browser.sleep(10000);
await this.Button.click();
await browser.sleep(10000);
await this.stopButton.click();
await waitForElAbsence(this.Bar);
await browser.waitForAngularEnabled(true);
}
used above calling function in below spec:
it('should check if button is clicable', async function() {
let po = new check({
url
});
await po.go();
await po.clickButton();
});
Has any one experienced it before ? Also the error is seen only browserstack and not on my local computer. Also the test i pasted is not the only one failing . Tests are failing randomly with this error.
I have protractor v5.3.2