When you run the command
ionic cordova run android --prod --release
This error appears
(node:13130) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'variables' of undefined
at /usr/local/lib/node_modules/cordova/node_modules/cordova-lib/src/cordova/restore-util.js:322:57
at Array.forEach (<anonymous>)
at Object.installPluginsFromConfigXML (/usr/local/lib/node_modules/cordova/node_modules/cordova-lib/src/cordova/restore-util.js:318:28)
at /usr/local/lib/node_modules/cordova/node_modules/cordova-lib/src/cordova/prepare.js:59:32
at _fulfilled (/usr/local/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/q/q.js:787:54)
at self.promiseDispatch.done (/usr/local/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/q/q.js:816:30)
at Promise.promise.promiseDispatch (/usr/local/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/q/q.js:749:13)
at /usr/local/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/q/q.js:557:44
at flush (/usr/local/lib/node_modules/cordova/node_modules/cordova-lib/node_modules/q/q.js:108:17)
at process._tickCallback (internal/process/next_tick.js:112:11)
(node:13130) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:13130) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
[OK] Your app has been deployed.
Did you know you can live-reload changes from your app with --livereload?
can you help me