I am facing the error in Magento **Localhost** which is 

> Exception #0 (Magento\Framework\Exception\LocalizedException): Invalid XML in file /var/www/html/magento/app/code/Mb/Customizations/etc/frontend/events.xml:
Element 'event', attribute 'cachable': The attribute 'cachable' is not allowed.
Line: 9

In the image you can see the error 
[![enter image description here][1]][1]

So after That I tried to remove **cacheable** from the core class
`magento/app/code/Mb/Customizations/etc/frontend/events.xml`
```
<?xml version="1.0"?>
 
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
	
	<event name="layout_generate_blocks_after">
		<observer name="cust_productCanonical" instance="Mb\Customizations\Observer\ProductCanonical"/>
	</event>

	<event name="controller_action_predispatch_checkout_index_index" cachable="false">
    	<observer name="checkcout_page_pre" instance="Mb\Customizations\Observer\Preloadtab" />
 	</event>
	<event name="controller_action_postdispatch_checkout_index_index" cachable="false">
    	<observer name="checkcout_page_post" instance="Mb\Customizations\Observer\Loadtab" />
 	</event>
 
</config>
```

but after removing the `casheable` from the above `xml` file it gives me some else error

> 1 exception(s):
Exception #0 (Magento\Framework\Exception\LocalizedException): Invalid XML in file /var/www/html/magento/app/code/TM/Crm/etc/frontend/events.xml:
Element 'config': Missing child element(s). Expected is ( event ).
Line: 2

[![enter image description here][2]][2]

So how can I remove this error and what is the problem in the above `xml` file. Thanks


  [1]: https://i.stack.imgur.com/wyWgQ.png
  [2]: https://i.stack.imgur.com/M8cah.png