我已经在Macbook上安装了所有必需的依赖项。由于出现以下错误并且浏览器窗口未启动。我已经正确配置了wdio conf文件。不知道我想念什么？
A service failed in the 'onPrepare' hook
Error: Unable to connect to selenium
at Timeout.hasStarted [as _onTimeout] (/Users/username/Documents/Projects/projectname/node_modules/selenium-standalone/lib/check-started.js:17:10)
at listOnTimeout (timers.js:324:15)
at processTimers (timers.js:268:5)
Continue...
[wdio-webcomponents] Overriding native wdio element/elements commands!
ERROR: Invalid protocol: localhost:
chrome
at new RuntimeError (/Users/username/Documents/Projects/projectname/node_modules/webdriverio/build/lib/utils/ErrorHandler.js:143:12)
at Request._callback (/Users/username/Documents/Projects/projectname/node_modules/webdriverio/build/lib/utils/RequestHandler.js:330:43)
at self.callback (/Users/username/Documents/Projects/projectname/node_modules/request/request.js:185:22)
at Request.emit (events.js:188:13)
at Request.EventEmitter.emit (domain.js:441:20)
at Request.init (/Users/username/Documents/Projects/projectname/node_modules/request/request.js:458:17)
at new Request (/Users/username/Documents/Projects/projectname/node_modules/request/request.js:127:8)
at request (/Users/username/Documents/Projects/projectname/node_modules/request/index.js:53:10)
at /Users/username/Documents/Projects/projectname/node_modules/webdriverio/build/lib/utils/RequestHandler.js:271:39
at new Promise (<anonymous>)
at new F (/Users/username/Documents/Projects/projectname/node_modules/core-js/library/modules/_export.js:36:28)
at RequestHandler.request (/Users/username/Documents/Projects/projectname/node_modules/webdriverio/build/lib/utils/RequestHandler.js:270:20)
at Request._callback (/Users/username/Documents/Projects/projectname/node_modules/webdriverio/build/lib/utils/RequestHandler.js:341:28)
at self.callback (/Users/username/Documents/Projects/projectname/node_modules/request/request.js:185:22)
at Request.emit (events.js:188:13)
at Request.EventEmitter.emit (domain.js:441:20)
[wdio-webcomponents] Overriding native wdio element/elements commands!
ERROR: Invalid protocol: localhost:
chrome
at new RuntimeError (/Users/username/Documents/Projects/projectname/node_modules/webdriverio/build/lib/utils/ErrorHandler.js:143:12)
at Request._callback (/Users/username/Documents/Projects/projectname/node_modules/webdriverio/build/lib/utils/RequestHandler.js:330:43)
at self.callback (/Users/username/Documents/Projects/projectname/node_modules/request/request.js:185:22)
at Request.emit (events.js:188:13)
at Request.EventEmitter.emit (domain.js:441:20)
at Request.init (/Users/username/Documents/Projects/projectname/node_modules/request/request.js:458:17)
at new Request (/Users/username/Documents/Projects/projectname/node_modules/request/request.js:127:8)
at request (/Users/username/Documents/Projects/projectname/node_modules/request/index.js:53:10)
at /Users/username/Documents/Projects/projectname/node_modules/webdriverio/build/lib/utils/RequestHandler.js:271:39
at new Promise (<anonymous>)
at new F (/Users/username/Documents/Projects/projectname/node_modules/core-js/library/modules/_export.js:36:28)
at RequestHandler.request (/Users/username/Documents/Projects/projectname/node_modules/webdriverio/build/lib/utils/RequestHandler.js:270:20)
at Request._callback (/Users/username/Documents/Projects/projectname/node_modules/webdriverio/build/lib/utils/RequestHandler.js:341:28)
at self.callback (/Users/username/Documents/Projects/projectname/node_modules/request/request.js:185:22)
at Request.emit (events.js:188:13)
at Request.EventEmitter.emit (domain.js:441:20)