Issue of Magento 2 Layered Navigation on Magento 2.2.6 CE: Class Magento\Elasticsearch\Model\Adapter\FieldMapperInterface does not exist

Created by Rosa Truong, Modified on Mon, 23 Dec, 2019 at 9:54 AM by Rosa Truong

Issue:

We have tried to install Magento 2 Layered Navigation v 1.1.3 on Magento 2.2.6 CE as but unfortunately, we got the error which says that:

[ReflectionException]
Class Magento\Elasticsearch\Model\Adapter\FieldMapperInterface does not exist

Solution:

About the issue, our developer has checked and found the root of it is that the class Elasticsearch is not in Magento 2.2.x Community version; it is only in the Enterprise version.

Hence, to fix the issue, we would suggest that you should try to comment the code in the file etc/di.xml

<!-- Compatible with elasticsearch v2.4 && M2.1.8 -->
<type name="Magento\Elasticsearch\SearchAdapter\Filter\Builder\Term">
    <plugin name="bss-ln-convert-condition" type="Bss\LayerNavigation\Plugin\TermFilterBuilder" sortOrder="1" />
</type>

and then remove this file

Bss\LayerNavigation\Plugin\TermFilterBuilder.php

Please check and follow our guide to fix the issue.

If you need any further support, please feel free to contact us at sales@bsscommerce.com

We'll be happy to support you.