Perch:error not displaying

I'm having trouble getting the perch:error content to display when a required form field is left blank. Instead of the custom error text in perch:error, the browser displays a generic "Fill out this field" message. The form functions in every other way, successfully logging entries. I'm stumped. Anyone else running into this?

<perch:form id="contact" method="post" app="perch_forms" class="form">

<div class="row"> <div class="small-12 medium-6 columns"> <perch:label for="name">Your Name</perch:label> <perch:input type="text" id="name" required="true" label="Name" /> <perch:error for="name" type="required">Please include your name</perch:error> </div>

<div class="small-12 medium-6 columns">
    <perch:label for="email">Your Email</perch:label>
    <perch:input type="email" id="email" required="true" label="Email" />
    <perch:error for="email" type="format">Please check your email address</perch:error>
    <perch:error for="email" type="required">Please include your email address</perch:error>
</div>

</div>

<perch:input type="submit" id="submit" name="submit" class="medium button warning" value="SEND" />

</perch:form>

Perch: 3.0, PHP: 7.0.6, MySQL: 5.5.53, with PDO Server OS: Linux, cgi-fcgi Installed apps: content (3.0), assets (3.0), categories (3.0), perch_blog (5.5), perch_forms (1.9), perch_members (1.6), perch_twitter (3.7) App runtimes: <?php $apps_list = array( 'perch_blog', 'perch_twitter', 'perch_forms', 'perch_members', ); PERCH_LOGINPATH: /perch PERCH_PATH: /nfs/c05/h05/mnt/70481/domains/dev-consulting.org/html/perch PERCH_CORE: /nfs/c05/h05/mnt/70481/domains/dev-consulting.org/html/perch/core PERCH_RESFILEPATH: /nfs/c05/h05/mnt/70481/domains/dev-consulting.org/html/perch/resources Image manipulation: GD PHP limits: Max upload 200M, Max POST 200M, Memory: 99M, Total max file upload: 99M F1: 0c66c2e1f82f9e0b7617b2cb8270f2c7 Resource folder writeable: Yes HTTP_HOST: dev-consulting.org.s70481.gridserver.com DOCUMENT_ROOT: /home/70481/domains/dev-consulting.org/html REQUEST_URI: /perch/core/settings/diagnostics/ SCRIPT_NAME: /perch/core/settings/diagnostics/index.php