Some fixes

custom-webpack.config.js

@@ -9,7 +9,8 @@ module.exports = {
       url: require.resolve("url/"),
       zlib: require.resolve('browserify-zlib'),
       assert: require.resolve("assert/"),
-      util: require.resolve("util/")
+      util: require.resolve("util/"),
+      buffer: require.resolve("buffer/")
     }
   }
 };

package.json

@@ -32,6 +32,7 @@
     "assert": "^2.0.0",
     "bootstrap": "^4.6.0",
     "browserify-zlib": "^0.2.0",
+    "buffer": "^6.0.3",
     "cesium": "^1.97.0",
     "core-js": "^2.6.12",
     "https-browserify": "^1.0.0",