renderer: 'webgl' on ol.layer.Vector blanks the layer

• Uncaught TypeError: renderer.getFeatures is not a function at VectorLayer.renderDeclutter (VectorLayer.js:412).
• map.getLayers().getLength() is correct and the source holds features, yet the canvas stays blank.
• Removing the renderer option makes the same data display normally.

1. Delete the renderer option and confirm the default canvas path renders.
2. Identify the layer class: ol.layer.Vector, ol.layer.WebGLPoints or ol.layer.VectorTile.
3. Check the type of the renderer value being passed.
4. Read the stack trace for renderDeclutter to confirm an interface mismatch.

Use new ol.layer.WebGLPoints({ source, style: expressionStyle }) with declarative keys such as 'circle-radius' and 'circle-fill-color', or keep ol.layer.Vector with ol.style.Style for per-feature styling and declutter.

Uncaught TypeError: renderer.getFeatures is not a function
    at VectorLayer.renderDeclutter (VectorLayer.js:412)

var style = {
  'circle-radius': [
    'interpolate', ['linear'], ['get', 'value'],
    0, 3,
    100, 12
  ],
  'circle-fill-color': [
    'case',
    ['>', ['get', 'value'], 80], '#e03131',
    '#1c7ed6'
  ],
  'circle-stroke-width': 1,
  'circle-stroke-color': '#ffffff'
};

var layer = new ol.layer.WebGLPoints({
  source: new ol.source.Vector({ features: features }),
  style: style
});

map.addLayer(layer);

• Passing an ol.style.Style function to a WebGLPoints layer does nothing because the style must be an expression object.
• Adding renderMode: 'hybrid' to a VectorLayer is ignored; that option belongs to VectorTile.