i am getting this error : " Deploy Source to Org failed to run "while deploying

Communicate Between Unrelated Components - trailmix 4b 

here is my code:-

<?xml version="1.0" encoding="UTF-8" ?>

<LightningMessageChannel xmlns="http://soap.sforce.com/2006/04/metadata">

    <masterLabel>CountUpdated</masterLabel>

    <isExposed>true</isExposed>

    <description>Message Channel to pass Count updates</description>

     <lightningMessageFields>

        <fieldName>operator</fieldName>

        <description>This is the operator type of the manipulation</description>

    </lightningMessageFields>

    <lightningMessageFields>

         <fieldName>constant</fieldName>

        <description>This is the number for the manipulation</description>

     </lightningMessageFields>

</LightningMessageChannel>

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