The XML invalid Element indexer, attribute class: [facet 'pattern'] The value in developer mode

Please Follow Below steps to resolved such error of Digit Pattern :

Making below changes on given files will help you to solve the error.

File Path is : /vendor/magento/framework/Indexer/etc/indexer.xsd

Do below change in line number 74:

<xs:pattern value="[a-zA-Z\\]+" /> to <xs:pattern value="[a-zA-Z0-9\\]+" />

1	<xs:pattern value="[a-zA-Z\\]+" /> to <xs:pattern value="[a-zA-Z0-9\\]+" />

File Path is : /vendor/magento/framework/Indexer/etc/indexer_merged.xsd

Do below change in line number 64:

<xs:pattern value="[a-zA-Z\\]+" /> to <xs:pattern value="[a-zA-Z0-9\\]+" />

1	<xs:pattern value="[a-zA-Z\\]+" /> to <xs:pattern value="[a-zA-Z0-9\\]+" />

File Path is : /vendor/magento/framework/Mview/etc/mview.xsd

Do below change in line number Line58:

<xs:pattern value="[a-zA-Z\\]+" /> to <xs:pattern value="[a-zA-Z0-9\\]+" />

1	<xs:pattern value="[a-zA-Z\\]+" /> to <xs:pattern value="[a-zA-Z0-9\\]+" />

Clean the cache and rerun the program.

Let us know via if this tutorial helps you to overcome the problem or not?

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Hire n. jethva