Error - “Object DOMDocument should be created” keeps appearing. Magento 2

Question

I created a custom module, that was throwing back errors. So I disabled and removed it from the app/code dir.

Then I cleared pub/static, var/generation, var/cache, var/view_processed

But I still kept getting an error that the Block name of the removed module doesn't exist.

I tried redeploying the static files, reindexing and setup:upgrade in the hope that would fix it, but no luck.

So I ended up removing all the files and reverting to a back up from 4 days earlier.

But the error still shows up in my system.log?

main.CRITICAL: Invalid block type: Vendor\ProductSlider\Block\Catalog\Product\ProductSlider [] []

Block from removed Module can be embed in cms page, static block, etc... — KAndy, May 14 '16 at 7:36

Dhiren Vasoya · Accepted Answer · 2016-11-22 09:26:57Z

To remove extension completely from Magento, you need to following things.

Remove extension folder from app/code.
Remove extension entry from config.php file avilable at app/etc folder of magento.
Remove extension entry from "setup_module" table from database.
Remove extensin block which you put either in CMS page or CMS block.

Now run the following commands:

php bin/magento cache:clean

php bin/magento indexer:reindex

php bin/magento setup:upgrade

php bin/magento setup:static-content:deploy

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