doesn't support null safety

[crack1108]

Because vimeoplayer 0.1.8 doesn't support null safety and no versions of vimeoplayer match >0.1.8 <0.2.0, vimeoplayer ^0.1.8 is forbidden.
So, because trainsolo depends on vimeoplayer ^0.1.8, version solving failed.

[leonardmatasel]

You could try omni_video_player. It handles Vimeo and other video sources more reliably and doesn’t require complex platform view setup