We're currently investigating this bug, but no matter how hard we tried, we literally can not reproduce it on our end. Are you playing on Android?
In the ACADEMY34 folder there is a [game] folder — inside there is [saves], all your saves should be there.
Just upload the save on dropbox or mega and send us the link!
Also to fix the issue you could try removing the checkmark on the [academy34] folder on the "Read-only" parameter (no guarantee it will solve anything):