'How to fix error "Could not find '@angular-devkit/build-angular:dev-server' builder's node package?

After creating a sideMenu project in Ionic 5/ Angular, I try to run the project using "ionic serve", but I get the error message:

Could not find '@angular-devkit/build-angular:dev-server' builder's node package

[ERROR] ng has unexpected closed (exit code 1).

Any suggestions?



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