Error after installing the plugin

[royalphp]

After I installed this plugin in my project, I get the following error:

libxml error: Element '{http://gediminasm.org/schemas/orm/doctrine-extensions-mapping}timestampable': No matching global element declaration available, but demanded by the strict wildcard.
in /app/vendor/sylius/adyen-plugin/config/doctrine/AdyenPaymentDetail.orm.xml at line 25
libxml error: Element '{http://gediminasm.org/schemas/orm/doctrine-extensions-mapping}timestampable': No matching global element declaration available, but demanded by the strict wildcard.
in /app/vendor/sylius/adyen-plugin/config/doctrine/AdyenPaymentDetail.orm.xml at line 28

I researched what the problem is, in the config/doctrine/AdyenPaymentDetail.orm.xml and config/doctrine/AdyenReference.orm.xml files gedmo is used in the following fields:

<field name="createdAt" column="created_at" type="datetime">
    <gedmo:timestampable on="create"/>
</field>
<field name="updatedAt" column="updated_at" type="datetime" nullable="true">
    <gedmo:timestampable on="update"/>
</field>

I tried replacing this with a simple use without gedmo as follows, and it worked:

<field name="createdAt" column="created_at" type="datetime"/>
<field name="updatedAt" column="updated_at" nullable="true" type="datetime"/>

I looked at similar cases for the MolliePlugin plugin, and it doesn't use gedmo, although there are such fields. Could you remove gedmo, and thus make this plugin more flexible?