This is a known issue that noone knows how to fix right now. Can you play on another device?
...Though maybe you can us help out; in your `documents/Ixalon/com.caribdis.eternum` folder, you should have a `log.txt` file and maybe a `traceback.txt` file. Can you send me those? I'm tanxui4261 on Discord; you might have to join Caribdis' Discord server first before you can DM me.