A screen transition was started while another one runs in another
computation: an enter, an edge, back, an action, a trail or a retrace while
another fiber is inside an enter or a retrace, or a retrace inside a running
open. The screens of a process are one surface with one screen on top, as in
the app, which never runs two transitions at once; running two is a client
error, refused before anything is sent.
A screen transition was started while another one runs in another computation: an enter, an edge,
back, an action, a trail or a retrace while another fiber is inside an enter or a retrace, or a retrace inside a running open. The screens of a process are one surface with one screen on top, as in the app, which never runs two transitions at once; running two is a client error, refused before anything is sent.