Answers for "ile '/Users/MAC/18WH1A0530_Angular/farmer/node_modules/@angular/material/index.d.ts' is not a module. 31 import { MatButtonModule, MatProgressBarModule } from '@angular/material'; ~~~~~~~~~~~~~~~~~~~"

@angular/material/index.d.ts

It is changed in updated version of angular i think.
To resolve this issue you need to downgrade the angular/material version

Try to update the angular material (@angular/[email protected]) of this version.

npm uninstall -g @angular/material
npm cache clean --force

npm install -g @angular/material@7