It's disappointing when a director tries to do too much and doesn’t quite succeed. That’s what happened with writer-director Jérémy Clapin’s latest movie, which was intended as a serious exploration of grief and how people try to move past it when something unexpected happens. The story centers on the puzzling vanishing of astronaut Franck Martens (voiced by Sébastien Pouderoux) during what appeared to be a normal sp…