StratMap CapArea, Brazos & Kerr Imagery (Natural Color 2021) layer no longer works

[elevenchars]

When this layer is selected in the editor, no tiles show up. The tile requests show the following response:

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<ServiceExceptionReport version="1.3.0"
  xmlns="http://www.opengis.net/ogc"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.opengis.net/ogc http://schemas.opengis.net/wms/1.3.0/exceptions_1_3_0.xsd">
  <ServiceException code="InvalidLayers">
Parameter 'Layers' contains invalid values.
  </ServiceException>
</ServiceExceptionReport>

This imagery is currently marked as "Best" for this region.