i wanna share the simple way I found to fix those issue
( react-packager has encountered, Error: ENOENT: no such file & other issue similar/familiar )
because I saw there are a lot of people facing the same,

i installed yarn https://yarnpkg.com/lang/en/docs/install/
then
I installed this package https://github.com/pmadruga/react-native-clean-project

yarn add -D react-native-clean-project

and after that everything goes well my react-native project worked again without initialize another new project and setup everything from scratch.

hope this helps others