Observe Angular Material package versions in package.json:
package.json"dependencies": { "@angular/core": "^5.0.0", ... "@angular/animations": "^5.0.0", "@angular/cdk": "^5.0.0-rc0", "@angular/flex-layout": "^2.0.0-beta.10-4905443", "@angular/material": "^5.0.0-rc0", "hammerjs": "^2.0.8",},
In this particular case, I had installed Material 5.0.0 during its RC phase. It is advisable to not ship Beta or RC libraries. Since our @angular/core package indicated that we're on Angular version 5.0.0, we will aim to upgrade to the latest 5.x.x release of Angular Material.