I am already using flutter_svg: ^2.0.2, this package requires 0.22.0
flutter_html >=2.0.0-nullsafety.1 <3.0.0-alpha.1 depends on flutter_svg >=0.22.0 <1.0.0 and MyApp depends on flutter_svg ^2.0.2, flutter_html >=2.0.0-nullsafety.1 <3.0.0-alpha.1 is forbidden.
So, because MyApp depends on flutter_html ^2.2.1, version solving failed.
I am already using flutter_svg: ^2.0.2, this package requires 0.22.0
flutter_html >=2.0.0-nullsafety.1 <3.0.0-alpha.1 depends on flutter_svg >=0.22.0 <1.0.0 and MyApp depends on flutter_svg ^2.0.2, flutter_html >=2.0.0-nullsafety.1 <3.0.0-alpha.1 is forbidden. So, because MyApp depends on flutter_html ^2.2.1, version solving failed.