I build Next.js in production throw error when use toggle menu same example. but I try to not use mdbreact Everything is fine

<MDBNavbar color="indigo" dark expand="md">
            <MDBNavbarBrand>
                <strong className="white-text">ADMIN</strong>
            </MDBNavbarBrand>
            <MDBNavbarToggler onClick={this.toggleCollapse} />
            <MDBCollapse id="navbarCollapse3" isOpen={this.state.isOpen} navbar>
                <MDBNavbarNav left>

                    <MDBNavItem>
                        <MDBDropdown>
                            <MDBDropdownToggle nav caret>
                                <span className="mr-2">ข้อมูลสินค้า</span>
                            </MDBDropdownToggle>
                            <MDBDropdownMenu>
                                <Link href="/addproduct"><MDBDropdownItem>เพิ่มข้อมูลสินค้า</MDBDropdownItem></Link>
                                <Link prefetch href="/showproducts"><MDBDropdownItem>ดูข้อมูลสินค้า</MDBDropdownItem></Link>
                            </MDBDropdownMenu>
                        </MDBDropdown>
                    </MDBNavItem>


                </MDBNavbarNav>
            </MDBCollapse>
        </MDBNavbar>