Hi @Travas Nolte,
Welcome to Microsoft Q&A!
Do you have any errors or warnings when starting the app?
Please try to update your Node.js and Angular CLI to the latest version.
You can also open the Visual Studio Installer > More > Repair your VS. Then, create a new Angular and ASP.NET Core project and check it again.
If it occurs after updating VS, you can consider rolling back VS to the previous version by opening the Visual Studio Installer > More > Rollback to previous version.
Sincerely,
Anna
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.