Because no versions of dotted_border match >1.0.7 <2.0.0 and dotted_border 1.0.7 depends on path_drawing ^0.4.1, dotted_border ^1.0.7 requires path_drawing ^0.4.1.
And because flutter_html >=1.3.0 <2.0.0-nullsafety.0 depends on flutter_svg ^0.20.0-nullsafety.3 which depends on path_drawing ^0.5.0-nullsafety.0, dotted_border ^1.0.7 is incompatible with flutter_html >=1.3.0 <2.0.0-nullsafety.0.
can you upgrade path_drawing?