Error building package

the project does not have any errors, did restart PC, did restart XDE,
all i get upon a deploy is "Building JavaScript bundle: error [object Object]“
any clues?
If i run exp build:android, this error pops up:
”[exp] Packager url http://localhost:19001/main.bundle?dev=false&minify=true&hot=false&assetPlugin=expo/tools/hashAssetFi
les&platform=ios returned unexpected code 500. Please open your project in the Expo app and see if there are any errors.
Also scroll up and make sure there were no errors or warnings when opening your project."
There are no errors anywhere shown …

Did you try opening the project in your Expo app?