Fix

src/app/services/navigation.service.ts

@@ -0,0 +1,26 @@
+import { Injectable } from '@angular/core'
+import { Location } from '@angular/common'
+import { Router, NavigationEnd } from '@angular/router'
+
+@Injectable({ providedIn: 'root' })
+export class NavigationService {
+  private history: string[] = []
+
+  constructor(private router: Router, private location: Location) {
+    this.router.events.subscribe((event) => {
+      if (event instanceof NavigationEnd) {
+        this.history.push(event.urlAfterRedirects)
+      }
+    })
+  }
+
+  back(): void {
+    this.history.pop()
+    if (this.history.length > 0) {
+      this.location.back()
+    } else {
+      this.router.navigateByUrl('/')
+    }
+  }
+}
+