Invalid Document Element 'total': Missing child element(s). Expected is one of ( title, title_source_field, font_size, amount_prefix ). in magento 2

Question

open admin panel and go to sales->invoice and select invoice and download PDF this issue is generated. i have check network show 500 error it is a permission issue hello everyone plz give me a solution. this problem ow to resolve in magneto 2

Answer 1

The problem will be in one of 3rd party extension which has pdf.xml file.

To solve this problem, run ssh command and find all pdf.xml files in your project. After that, open each 3rd extensions pdf.xml file and check, do < total > have one of the following child: title, title_source_field, font_size, amount_prefix

I fixed it by adding < title > tag.

<totals>
    <total name="extra_fee">
        <!-- I fixed it by adding <title> child -->
        <title>Extra fee</title>
        <!-- End of changes -->
        <source_field>extra_fee</source_field>
        <model>.....</model>
        <font_size>7</font_size>
        <display_zero>false</display_zero>
        <sort_order>600</sort_order>
    </total>    
</totals>

Answer 2

Today i fix it. vendor/magento/module-sales/etc

the file is pdf.xsd

 <xs:complexType name="totalItemType">
    <xs:all>
        <xs:element name="title" type="totalTitleType" minOccurs="0"/>
        <xs:element name="source_field" type="fieldType" minOccurs="0"/>
        <xs:element name="title_source_field" type="fieldType" minOccurs="0"/>
        <xs:element name="font_size" type="xs:positiveInteger" minOccurs="0"/>
        <xs:element name="display_zero" type="xs:boolean" minOccurs="0"/>
        <xs:element name="sort_order" type="xs:nonNegativeInteger" minOccurs="0"/>
        <xs:element name="model" type="classNameType" minOccurs="0"/>
        <xs:element name="amount_prefix" type="xs:string" minOccurs="0"/>
    </xs:all>
    <xs:attribute name="name" type="xs:string" use="optional"/>
</xs:complexType>