Application is not opening up: getting error-localhost/:1 Failed to load resource: the server responded with a status of 404 (Not Found)

[Swati Dubey]

 i was trying to run my application by using command "ng serve --open" on the command line . 

And getting error localhost/:1 Failed to load resource: the server responded with a status of 404 (Not Found) on 

Also I was working on the other project 2"confusion" which was running on the port 4200. I closed the command line running the project "confusion" and run the ng serve --open command to run my current project namely preschool.

The path of project preschool is:

F:\full sttack web and multiplatform mobile app development\front-end-javascript-frameworks-Angular\week-4\project\preschool

I am a newbie to angular

Why I am getting this error and how to fix it?

If needed more code from my project , please ask me .

Attachment: errorcode_3693fd6a.zip

[Christopher Issac Sunder K]

Hi Swati, 

Greetings from Syncfusion support. 

We have looked into your query. Based on the provided details, it seems that during the compilation of the project the angular flex-layout package has compile issue. While analyzing about this issue, we figured out this is an known issue with this package. Please find the details in the following link. 

https://github.com/angular/flex-layout/issues/851  

Anyhow, we have resolved the compile issue in the package by upgrading the ng packages to the latest version. You can follow the below threads which we have used to resolve the issue in the application. 

https://stackoverflow.com/questions/54183309/cannot-find-name-mediaquerylisteventmap-when-i-compile-my-angular-project  

https://stackoverflow.com/questions/52766159/problem-in-flex-layout-comes-when-ran-ng-serve  

You can find the sample which we prepared from the following link. 

http://www.syncfusion.com/downloads/support/forum/142774/ze/error-code-1389218555  

Please let us know if you need assistance related to Syncfusion products. 

Thanks, 

Christo