You have to format your test steps as XML:

<steps>
    <step type="ValidateStep">
        <parameterizedString isformatted="true">Step 1</parameterizedString>
        <parameterizedString isformatted="true">Result 1</parameterizedString>
        <description/>
    </step>
    <step type="ValidateStep">
        <parameterizedString isformatted="true">Step 2</parameterizedString>
        <parameterizedString isformatted="true">Result 2</parameterizedString>
        <description/>
    </step>
</steps>

Found here: https://stackoverflow.com/a/54107054/4818105

You have to format your test steps as XML:

<steps id="0" last="1">
    <step id="0" type="ValidateStep">
        <parameterizedString isformatted="true">Step 1</parameterizedString>
        <parameterizedString isformatted="true">Result 1</parameterizedString>
        <description/>
    </step>
    <step id="1" type="ValidateStep">
        <parameterizedString isformatted="true">Step 2</parameterizedString>
        <parameterizedString isformatted="true">Result 2</parameterizedString>
        <description/>
    </step>
</steps>

Found here: https://stackoverflow.com/a/54107054/4818105