Error while building Angular app with agm-spiderfier

    Please modify your both the files as below.
    
    tsconfig.app.json
    
    "include": [
        "src/**/*.d.ts",
        "node_modules/agm-spiderfier/**/*.ts"
      ]
    

tsconfig.spec.json
    
     "include": [
        "src/**/*.spec.ts",
        "src/**/*.d.ts",
        "node_modules/agm-spiderfier/**/*.ts"
      ]