Geometry has too many edges (Google Earth Engine). Help me

The geometry has too many vertices. You can try to simplify it using:

// Get a feature collection and subset the first feature.
var feature = ee.FeatureCollection("TIGER/2018/States").first();

// Simplify the feature - think of max error as resolution.
// Setting to 100 means that the geometry is accurate to
// within 100 meters, for example.
var featureSimple = ee.Feature(feature).simplify({maxError: 100});

or for a ee.FeatureCollection:

// Get a feature collection.
var featureCol = ee.FeatureCollection("TIGER/2018/States");

// Simplify each feature in the collection, by mapping the
// .simplify() function over it. 
var simplifiedCol = featureCol.map(function(feature) {
  return feature.simplify({maxError: 100});
});