What are the errors in header layout?

Question

Layout

<header class="header">
            <section class="header__search-block">
                <input type="text" class="header__search-field">
            </section>
            <section class="header__profile-block">
                <img src="" alt="profile picture" class="header__profile-picture">

                <section class="header__buttons">
                    <div class="header__messages-btn"></div>
                    <div class="header__notifications-btn"></div>
                    <div class="header__settings-btn"></div>
                    <div class="header__logout-btn">LOGOUT</div>
                </section>
            </section>
</header>

I'm trying to do BEM.