ImprovementDefs.xml has a prerequisite error for the Hyperion Matrix:

<Improvement>
    <InternalName>HyperionMatrix</InternalName>
    <DisplayName>HyperionMatrix_Name</DisplayName>
    <ShortDescription>HyperionMatrix_ShortDec</ShortDescription>
    <Description>HyperionMatrix_Dec</Description>
    <Icon>HyperionMatrix.png</Icon>
    <BuildIcon>HyperionMatrix_Build.png</BuildIcon>
    <ListIcon>HyperionMatrix_Icon.png</ListIcon>
    <ImprovementType>Research</ImprovementType>
    <PlacementType>MilitaryUnique</PlacementType>
    <IsPlayerWonder>true</IsPlayerWonder>

.....

<Prerequ>
      <Techs>
        <Option>StellarCartography</Option>
      </Techs>
    </Prerequ>

This should be:

<Prerequ>
      <Techs>
        <Option>HyperionMatrixTech</Option>
      </Techs>
    </Prerequ>