Accesibility issues

hey, our url: https://dev.stinpriza.org/newpant we use this for accessibility checks: https://achecker.ca/checker/index.php we fixed some issues, but need help with this, which is also on the demo site: 3.3 Input Assistance: Help users avoid and correct mistakes. Success Criteria 3.3.2 Labels or Instructions (A) Check 188: Label text is empty. Repair: Add text to the label element. Error Line 512, Column 1: <input type="search" class="search-field" placeholder="Search" value="" name="s" />(post-1) Error Line 512, Column 1: <input type="search" class="search-field" placeholder="Search" value="" name="s" />(post-1)