Carpeta encriptada vacía

Hola, he encriptado una carpeta en el escritorio y he subido archivos en ella. En un primer momento podía acceder a los documentos poniendo la contraseña, sin problema. Luego he creado una nueva carpeta encriptada en el Dropbox y a los minutos he intentado acceder de nuevo a la carpeta del escritorio pero está vacía. Antes de ello me salía el siguiente error:

java.nio.file.FileSystemAlreadyExistsException
at org.cryptomator.cryptofs.CryptoFileSystems.lambda$create$0(CryptoFileSystems.java:49)
at java.base/java.util.concurrent.ConcurrentHashMap.compute(Unknown Source)
at org.cryptomator.cryptofs.CryptoFileSystems.create(CryptoFileSystems.java:40)
at org.cryptomator.cryptofs.CryptoFileSystemProvider.newFileSystem(CryptoFileSystemProvider.java:301)
at org.cryptomator.cryptofs.CryptoFileSystemProvider.newFileSystem(CryptoFileSystemProvider.java:93)
at java.base/java.nio.file.FileSystems.newFileSystem(Unknown Source)
at java.base/java.nio.file.FileSystems.newFileSystem(Unknown Source)
at org.cryptomator.cryptofs.CryptoFileSystemProvider.newFileSystem(CryptoFileSystemProvider.java:134)
at org.cryptomator.common.vaults.Vault.createCryptoFileSystem(Vault.java:121)
at org.cryptomator.common.vaults.Vault.unlock(Vault.java:138)
at org.cryptomator.ui.unlock.UnlockWorkflow.attemptUnlock(UnlockWorkflow.java:107)
at org.cryptomator.ui.unlock.UnlockWorkflow.call(UnlockWorkflow.java:90)
at org.cryptomator.ui.unlock.UnlockWorkflow.call(UnlockWorkflow.java:44)
at javafx.concurrent.Task$TaskCallable.call(Task.java:1425)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)

Qué puedo hacer para solucionarlo? He perdido documentos importantes!