fix: fix null injection (#98)

Author: YanaYestr

apps/gauzy/src/app/app.module.ts

@@ -8,7 +8,14 @@ import { ExtraOptions, Router, RouterModule } from '@angular/router';
 import { BrowserModule } from '@angular/platform-browser';
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
 import { AkitaNgDevtools } from '@datorama/akita-ngdevtools';
-import { NbMenuModule, NbChatModule, NbDialogModule, NbToastrModule, NbWindowModule } from '@nebular/theme';
+import {
+	NbMenuModule,
+	NbChatModule,
+	NbDialogModule,
+	NbToastrModule,
+	NbWindowModule,
+	NbDatepickerModule
+} from '@nebular/theme';
 import { NbEvaIconsModule } from '@nebular/eva-icons';
 import { TranslateModule, TranslateLoader } from '@ngx-translate/core';
 import { FileUploadModule } from 'ng2-file-upload';
@@ -76,6 +83,7 @@ const NB_MODULES = [
 	NbDialogModule.forRoot(),
 	NbWindowModule.forRoot(),
 	NbToastrModule.forRoot(),
+	NbDatepickerModule.forRoot(),
 	NbChatModule.forRoot({ messageGoogleMapKey: environment.CHAT_MESSAGE_GOOGLE_MAP }),
 	NbEvaIconsModule
 ];

apps/gauzy/src/app/pages/pages.module.ts

@@ -1,14 +1,14 @@
 import { NgModule } from '@angular/core';
 import { CommonModule } from '@angular/common';
-import { NbSpinnerModule, NbIconModule, NbSidebarModule, NbDatepickerModule } from '@nebular/theme';
+import { NbSpinnerModule, NbIconModule, NbSidebarModule } from '@nebular/theme';
 import { FeatureToggleModule as NgxFeatureToggleModule } from 'ngx-feature-toggle';
 import { AuthService, CommonNavModule, RoleGuard } from '@gauzy/ui-core/core';
 import { MiscellaneousModule } from '@gauzy/ui-core/shared';
 import { ThemeModule } from '@gauzy/ui-core/theme';
 import { PagesComponent } from './pages.component';
 import { PagesRoutingModule } from './pages-routing.module';
 
-const NB_MODULES = [NbSpinnerModule, NbIconModule, NbSidebarModule.forRoot(), NbDatepickerModule.forRoot()];
+const NB_MODULES = [NbSpinnerModule, NbIconModule, NbSidebarModule.forRoot()];
 
 @NgModule({
 	imports: [