Nuxt build error in LayerUtils.ts

ERROR in node_modules/@digital-earth/frontend-framework/lib/map/utils/LayerUtils.ts 30:46-57
TS2339: Property 'getFeatures' does not exist on type 'Source'.
    28 |         if (source && (typeof source['getFeatures'] === "function") || source instanceof VectorSource) {
    29 |             // get features from source
  > 30 |             let features: Feature[] = source.getFeatures();
       |                                              ^^^^^^^^^^^
    31 |             if (features && features.length) {
    32 |                 for (let feature of features) {
    33 |                     // get the features geometry

 FATAL  Nuxt build error