This is the same issue as reported regarding the NaniteCloudShip ship classes, except it is regarding the ShieldBubbleShip ship classes as follows:

    <ShipClass>
        <InternalName>AltarianShieldBubbleShip</InternalName>
        <DisplayName>TerranAllianceShieldBubbleShip_Name</DisplayName>
        <Description>TerranAllianceShieldBubbleShip_Dec</Description>
        <ThumbnailOverride>Altarian_Cutter_01T.PNG</ThumbnailOverride>
        <ShipHullType>Small</ShipHullType>
        <ShipRule>Balanced</ShipRule>
        <ShipDesign>Altarian_Cutter_01T</ShipDesign>
        <AIShipClass>Frigate</AIShipClass>
        <StrategicIcon>Cutter</StrategicIcon>
        <BlueprintDef>CutterBlueprint</BlueprintDef>
        <BlueprintAugmentDef>BPAugment_ShieldBubbleShip</BlueprintAugmentDef>
    </ShipClass>

The BPAugment_ShieldBubbleShip blueprint augment definition does not exist.

Instead, it should be BPAugment_ShieldBubble .

The ship components are appropriately showing up now in the ship designer after this is corrected.