White screen and type script error


#1

hello,
i wanted to build the apk of my project but after generating the apk and installing it i saw the white screen problem. after that i realized that by running ionic serve i’ve gotten such a typescript error:


that you can see some of the errors in the picture, then i noticed there is something wrong with local notification so i installed it by these commands:
$ ionic cordova plugin add cordova-plugin-local-notification
$ npm install --save @ionic-native/local-notifications
but none of the errors even changed
should i add something else?
thanks for your attention