I also face same issue. But in my case package's for Angular 14 was upto date. Issue was with "ngx-build-plus" package use for building Angular app in angular.json Angular.json

When I check package.json, it was not update as per Angular version and still pointing to old version(13.x) of Angular. I updated ngx-build-plus package to 14.x.x and did "npm install" again and then "npm start" and it work as expected.

So far above issue when you check which package is use to build you angular project in "Angular.json" file and set its proper version in pacakge.json resolve my issue.