Error when unlocking: "Did not find feasible mount point."

Hello community!
When i try to open my vault …
i see this error:

org.cryptomator.common.vaults.Volume$VolumeException: Did not find feasible mount point.
	at org.cryptomator.common.vaults.FuseVolume.chooseNonExistingTemporaryMountPoint(FuseVolume.java:96)
	at org.cryptomator.common.vaults.FuseVolume.prepareTemporaryMountPoint(FuseVolume.java:73)
	at org.cryptomator.common.vaults.FuseVolume.mount(FuseVolume.java:55)
	at org.cryptomator.common.vaults.Vault.unlock(Vault.java:129)
	at org.cryptomator.ui.unlock.UnlockWorkflow.attemptUnlock(UnlockWorkflow.java:103)
	at org.cryptomator.ui.unlock.UnlockWorkflow.call(UnlockWorkflow.java:80)
	at org.cryptomator.ui.unlock.UnlockWorkflow.call(UnlockWorkflow.java:43)
	at javafx.concurrent.Task$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)

somebody know the correct steps to fix this,
thanks!

This is a known issue if Cryptomator is unable to quit properly with opened vaults, see

The fix is to delete all the temporary and empty directories in ~/.local/share/Cryptomator/mnt/.