Feliz.Markdown is used in the project. The root cause: Feliz.UseElmish 4.1 requires Feliz >= 3.1.1, but Feliz.Markdown 2.4 was compiled against Feliz 2.x which had Feliz.ReactApi. No newer Feliz.Markdown compatible with Feliz 3.x exists on NuGet.
The fix is to pin Feliz to 2.9.0 (latest 2.x) and cap Feliz.UseElmish to a version compatible with it:
@Zaid-Ajaj : could you have a look at this?