problem

<ng-sidebar [(opened)]="local.mobileMenu" [closeOnClickOutside]="true" [showBackdrop]="true" [autoFocus]="false">
        <div class="mobile-header">
            <img src="/assets/images/logo.png" height="25">
            <a class="btn btn-link" (click)="local.mobileMenu = false"><i class="fa fa-bars"></i></a>
        </div>
        <nav class="nav flex-column mobile-menu hidden-md-up">
            <span *ngIf="!menuChange">
                <a class="nav-link" routerLink="/" routerLinkActive="active" [routerLinkActiveOptions]="{ exact: true }">Home</a>
                <a class="nav-link" routerLink="/about" routerLinkActive="active">About Us</a>
            </span>
        </nav>
    </ng-sidebar>