Unable to click a drop down button in selenium

Question

<div class="select-wrapper initialized">
  <span class="caret">▼</span>
  <input type="text" class="select-dropdown" readonly="true" data-activates="select-options-56a6924e-42d9-1f78-1b82-fe2c1cbdfbdd" value="R3PORTS, INC">

and my code is :

driver.findElement(By.cssSelector("div.select-wrapper.initialized")).click();

My error is :

org.openqa.selenium.WebDriverException: unknown error: Element ... is not clickable at point (210, 30). Other element would receive the click: ...