Add custom field in system Configuration in magento 2

Question

I have tried to add new field in System configuration in magento 2. I have used the below code, but I am getting this error:

Could not create an acl object: Invalid XML in file path/to/file

Suggest me the correct way to do this. Thanks in advance!!

acl.xml

<?xml version="1.0"?>
<!--
/**
 * Location: magento2_root/app/code/Namespace/Module/etc/acl.xml
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
 <acl>
 <resources>
 <resource id="Magento_Backend::admin">
 <resource id="Magento_Backend::stores">
 <resource id="Magento_Backend::stores_settings">
 <resource id="Magento_Config::config">
 <resource id="NAmespace_Module::config" title="Custom Settings" sortOrder="50" />
 </resource>
 </resource>
 </resource>
 </resource>
 </resources>
 </acl>

system.xml

<?xml version="1.0"?>
<!--
/**
 * Location: magento2_root/app/code/Namespace/Module/etc/adminhtml/system.xml
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
 <system>
 <tab id="settings" translate="label" sortOrder="1000">
 <label>Settings</label>
 </tab>
 <section id="example_section" translate="label" type="text" sortOrder="100" showInDefault="1" showInWebsite="1" showInStore="1">
 <label>Example config section</label>
 <tab>settings</tab>
 <resource>Namespace_Module::config</resource>
 <group id="general" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1">
 <field id="facebook" translate="label" type="text" sortOrder="20" showInDefault="1" showInWebsite="1" showInStore="1">
 <label>Facebook</label>
 </field>
 <field id="textarea_example" translate="label" type="textarea" sortOrder="50" showInDefault="1" showInWebsite="1" showInStore="1">
 <label>Textarea example</label>
 </field>
 </group>
 </section>
 </system>
</config>

Answer 1

problem with your acl.xml replace this urn:magento:module:Magento_Config:etc/system_file.xsd with urn:magento:framework:Acl/etc/acl.xsd

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Acl/etc/acl.xsd">
 <acl>
 <resources>
 <resource id="Magento_Backend::admin">
 <resource id="Magento_Backend::stores">
 <resource id="Magento_Backend::stores_settings">
 <resource id="Magento_Config::config">
 <resource id="Spacename_Module::config" title="Module configuration" sortOrder="50" />
 </resource>
 </resource>
 </resource>
 </resource>
 </resources>
 </acl>
 </config>

• Deeban Babu: Same error occur
• Qaisar Satti: @DeebanBabu updated tested code... follow this
• Deeban Babu: What is the issue in my xml
• Qaisar Satti: @DeebanBabu i already mention the issue in your xml. rest i cannot test now so i added the working example
• Deeban Babu: "Could not create an acl object: Invalid XML in file ../etc/acl.xml:Premature end of data in tag config line 1