At The Long Device and Erzen countered The Thing From Beyond Time. Was able to defeat it and selected a spell as the scenario reward... and then everything hung and it won't give me an option to proceed. Usually when this happens I close the game completely, restart it and continue and sometimes it gives the option to continue, but not so far for this one and I've tried half a dozen times.

This has been fixed and it in the current patch which is populating Apple and Google servers now.