Magento 2: System.xml configuration shows blank
Kindly set your email_templates.xml file under etc folder with below contents,
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Email:etc/email_templates.xsd">
<template id="cust_general_your_email_template_field_id" label="Label Of Your Template File" file="your_email_template.html" type="html" module="Amitshree_Customer" area="adminhtml"/>
</config>
You need to pass your template with id equals to cust_general_your_email_template_field_id
Remove var/generation folder or generated folder from root.