After I changed to developer mode, I can't view the main page, and get the following exception (Magento 2.1.2)
Invalid XML in file x.com/app/code/Ves/ImageSlider/etc/widget.xml:
Element 'description': This element is not expected. Expected is ( value ).
The issue is labelled to be at this area of the xml file
<parameter name="autoplay_timeout" xsi:type="text" visible="true">
<label translate="true">Autoplay Timeout</label>
<depends><parameter name="autoplay" value="1" /></depends>
<description translate="true"><![CDATA[Default: 3000]]></description>
<value>3000</value>
</parameter>
<parameter name="autoplay_speed" xsi:type="text" visible="true">
<label translate="true">Autoplay Speed</label>
<depends><parameter name="autoplay" value="1" /></depends>
<description translate="true"><![CDATA[Default: 800]]></description>
<value>800</value>
</parameter>
app/code/Ves/ImageSlider/etc/widget.xml
?