Я не смог найти ни одной открытой проблемы на GitHub , пока что понизил ваши @angular/cdk:"6.0.0"
и "@angular/material": "6.0.0"
Измените ваш package.json
"dependencies": {
"@angular/animations": "^6.0.6",
"@angular/cdk": "6.0.0",
"@angular/common": "^6.0.3",
"@angular/compiler": "^6.0.3",
"@angular/core": "^6.0.3",
"@angular/forms": "^6.0.3",
"@angular/http": "^6.0.3",
"@angular/material": "6.0.0",
"@angular/platform-browser": "^6.0.3",
"@angular/platform-browser-dynamic": "^6.0.3",
"@angular/router": "^6.0.3",
"core-js": "^2.5.4",
"rxjs": "^6.0.0",
"zone.js": "^0.8.26"
},
Выполнить npm i