[Update]
This issue is scheduled to be fixed in a version update by the end
of September.
Thank you for playing
FINAL FANTASY BRAVE EXVIUS.
We are aware that some players are
experiencing an issue in certain portions of the game where
bringing their own units as companions into battle causes the game
to crash.
This is caused by an error in companion name settings, regarding
"Unit Name" versus "Companion".
Players are advised to go to Menu > Options > Companion
Names and keep companion names set as "Companion" to avoid
triggering this issue until it's fixed in a future version update.
We will inform players again when we are certain when it will be
fixed.
Our humble apologies for any inconvenience caused.
Thank you very much for your understanding.
- The FINAL FANTASY BRAVE EXVIUS Team