嗨，我在项目中运行子应用程序时遇到此错误。
NullInjectorError: R3InjectorError(userManagementSharedModule)[MatCommonModule -> HighContrastModeDetector -> HighContrastModeDetector -> HighContrastModeDetector]:
NullInjectorError: No provider for HighContrastModeDetector!
在我的项目中，当我尝试运行一个高于错误的子应用程序时，有5个以上的子应用程序。
我的package.json放在这里。
"dependencies": {
"@agm/core": "~1.1.0",
"@angular/animations": "~9.0.6",
"@angular/cdk": "^9.1.2",
"@angular/cli": "^9.1.2",
"@angular/common": "^9.0.6",
"@angular/compiler": "^9.0.6",
"@angular/core": "^9.0.6",
"@angular/forms": "^9.0.6",
"@angular/http": "^7.2.16",
"@angular/localize": "^9.0.6",
"@angular/material": "^9.1.2",
"@angular/platform-browser": "^9.0.6",
"@angular/platform-browser-dynamic": "^9.0.6",
"@angular/router": "^9.0.6",
"@fullcalendar/core": "^4.4.0",
"@ng-bootstrap/ng-bootstrap": "^6.0.0",
"@types/date-fns": "^2.6.0",
"angular-calendar": "^0.28.5",
"angular-dual-listbox": "^5.0.1",
"angular-gridster2": "^9.1.0",
"angular-resize-event": "^1.2.1",
"angular2-draggable": "^2.3.2",
"angular2-fullcalendar": "^1.0.19",
"angular2-multiselect-dropdown": "^4.6.3",
"angular2-uuid": "^1.1.1",
"angular7-csv": "^0.2.12",
"bn-ng-idle": "^1.0.1",
"bootstrap": "4.4.1",
"core-js": "^3.6.4",
"rxjs-compat": "^6.2.0",
"sweetalert2": "9.10.1",
"tslib": "^1.11.1",
"web-animations-js": "^2.3.2",
"xlsx": "^0.15.6",
"zone.js": "~0.10.2"
},
"devDependencies": {
"@angular-devkit/build-angular": "~0.900.6",
"@angular/compiler-cli": "^9.1.0",
}
有人帮助我解决了这个问题