我将角度v6更新为角度v8，将角度版本8更新为运行项目后，显示错误。
core.js:5847 ERROR DOMException: Failed to execute 'open' on 'XMLHttpRequest': Invalid URL
at http://192.168.10.180:4200/polyfills.js:8566:31
at XMLHttpRequest.proto.<computed> [as open] (http://192.168.10.180:4200/polyfills.js:6697:24)
at Observable._subscribe (http://192.168.10.180:4200/vendor.js:29318:17)
at Observable.push../node_modules/rxjs/_esm5/internal/Observable.js.Observable._trySubscribe (http://192.168.10.180:4200/vendor.js:133894:25)
at Observable.push../node_modules/rxjs/_esm5/internal/Observable.js.Observable.subscribe (http://192.168.10.180:4200/vendor.js:133880:22)
at subscribeToResult (http://192.168.10.180:4200/vendor.js:145294:23)
at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._innerSub (http://192.168.10.180:4200/vendor.js:139828:90)
at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._tryNext (http://192.168.10.180:4200/vendor.js:139822:14)
at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._next (http://192.168.10.180:4200/vendor.js:139805:18)
at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber.next (http://192.168.10.180:4200/vendor.js:134512:18)