Same here – no timeline items or media items have start / finish dates. I did manually add duration amounts on all our media items in the dynamic playlist, and work to shorten all the names just in case.
I’m wondering if the cypher length item is due to the length of the layout as a whole. After the input too large for RSA cipher I get the message “Unopenable message: unknown block type”. Then nothing seems to sync.
I did speak too soon. While the one layout seemed to start working on that display, the others did not (and we have about 80 layouts – one for each of our schools).