Because date_picker_timeline >=1.1.0 depends on intl ^0.16.0 and every version of flutter_localizations from sdk depends on intl 0.17.0, date_picker_timeline >=1.1.0 is incompatible with flutter_localizations from sdk. And because easy_localization >=2.1.0+1 depends on flutter_localizations any from sdk, date_picker_timeline >=1.1.0 is incompatible with easy_localization >=2.1.0+1. So, because TimyTimeMain depends on both date_picker_timeline ^1.1.3 and easy_localization ^2.3.3, version solving failed.
intl: ">=0.16.0 <=0.17.0-nullsafety.2"
easy_localization: ^2.3.3
date_picker_timeline: ^1.1.3
flutter doctor? - Srilal Sachinthadate_picker_timelinepackage has a new version. Try to upgrade it: ^1.2.1 - Akif