That WORKED !!

[XiaobenLi00]

          That WORKED !!

I guess it is because now the registration is performed by each new process.

I only get this warning about render_mode (which is an unrelated and minor issue):
UserWarning: WARN: The environment is being initialised with render_mode='rgb_array' that is not in the possible render_modes ([]).

Thanks !

Originally posted by @AxKo in #1968 (comment)