Can' unlock my new Vault

I try to use Cryptomator with Linux Mint 19.2 Tina 64-bit with Cryptomator 1.4.15
I run it as user. After creating a Vault, I can’t unlock it any more.
Running it as Administrator it works.
Would be nice to get some advice.
Thanks

20:37:28.805 [main] INFO org.cryptomator.launcher.Cryptomator - Starting Cryptomator 1.4.15 on Linux 4.15.0-58-generic (amd64)
20:37:28.824 [main] DEBUG org.cryptomator.logging.DebugMode - Debug mode enabled
20:37:28.839 [main] DEBUG org.cryptomator.launcher.IpcFactory - [Client] Failed to connect.
20:37:28.840 [main] DEBUG org.cryptomator.launcher.IpcFactory - [Client] Failed to connect.
20:37:29.307 [main] DEBUG org.cryptomator.launcher.IpcFactory - [Server] Wrote IPC port 44383 to /home/online/.config/Cryptomator/ipcPort.bin
20:37:29.329 [main] INFO o.c.launcher.IpcProtocolImpl - Received launch args:
20:37:29.341 [main] DEBUG org.cryptomator.launcher.Cryptomator - Did not find running application instance. Launching GUI…
20:37:30.814 [JavaFX Application Thread] INFO org.cryptomator.launcher.Cryptomator - JavaFX application started.
20:37:30.966 [JavaFX Application Thread] DEBUG org.cryptomator.ui.l10n.Localization - Loaded localization default file: /localization/en.txt
20:37:30.967 [JavaFX Application Thread] DEBUG org.cryptomator.ui.l10n.Localization - Detected language “de” and region “DE”
20:37:30.981 [JavaFX Application Thread] TRACE org.cryptomator.ui.l10n.Localization - Attempting to load localization from: /localization/de_DE.txt
20:37:30.984 [JavaFX Application Thread] TRACE org.cryptomator.ui.l10n.Localization - Attempting to load localization from: /localization/de.txt
20:37:33.087 [JavaFX Application Thread] INFO o.c.ui.controllers.MainController - Unable to setPreferencesHandler, probably not supported on this OS.
20:37:53.244 [Background Thread 2] DEBUG o.cryptomator.cryptofs.ReadonlyFlag - Vault opened for read and write.
20:37:56.214 [Background Thread 2] INFO org.eclipse.jetty.util.log - Logging initialized @33109ms to org.eclipse.jetty.util.log.Slf4jLog
20:37:56.807 [Background Thread 2] INFO o.c.frontend.webdav.WebDavServer - Binding server socket to localhost:42427
20:37:56.921 [Background Thread 2] INFO o.e.jetty.server.AbstractConnector - Started ServerConnector@3ff90ebd{HTTP/1.1,[http/1.1]}{localhost:42427}
20:37:56.957 [Background Thread 2] INFO org.eclipse.jetty.server.Server - jetty-9.4.17.v20190418; built: 2019-04-18T19:45:35.259Z; git: aa1c656c315c011c01e7b21aabb04066635b9f67; jvm 11.0.2+9
20:37:57.182 [Background Thread 2] INFO o.e.j.server.handler.ContextHandler - Started o.e.j.s.ServletContextHandler@38704dfb{/,null,AVAILABLE}
20:37:57.183 [Background Thread 2] INFO org.eclipse.jetty.server.Server - Started @34080ms
20:37:57.184 [Background Thread 2] INFO o.c.frontend.webdav.WebDavServer - WebDavServer started.
20:37:57.473 [Background Thread 2] INFO org.eclipse.jetty.server.session - DefaultSessionIdManager workerName=node0
20:37:57.474 [Background Thread 2] INFO org.eclipse.jetty.server.session - No SessionScavenger set, using defaults
20:37:57.479 [Background Thread 2] INFO org.eclipse.jetty.server.session - node0 Scavenging every 660000ms
20:37:57.542 [Background Thread 2] INFO o.a.j.w.server.AbstractWebdavServlet - authenticate-header = Basic realm=“Jackrabbit Webdav Server”
20:37:57.547 [Background Thread 2] INFO o.a.j.w.server.AbstractWebdavServlet - csrf-protection = null
20:37:57.548 [Background Thread 2] INFO o.a.j.w.server.AbstractWebdavServlet - createAbsoluteURI = true
20:37:57.549 [Background Thread 2] INFO o.e.j.server.handler.ContextHandler - Started o.e.j.s.ServletContextHandler@30343ee3{/ikzx2R4tRMlW/CRTest,null,AVAILABLE}
20:37:57.551 [Background Thread 2] INFO o.c.f.w.s.WebDavServletController - WebDavServlet started: /ikzx2R4tRMlW/CRTest
20:37:57.572 [Background Thread 2] INFO o.c.f.w.s.WebDavServletController - Mounting http://localhost:42427/ikzx2R4tRMlW/CRTest using org.cryptomator.frontend.webdav.mount.LinuxGioMounter
20:37:57.795 [JavaFX Application Thread] ERROR o.c.ui.controllers.UnlockController - Unlock failed for technical reasons.
org.cryptomator.ui.model.Volume$VolumeException: org.cryptomator.frontend.webdav.mount.Mounter$CommandFailedException: Command failed with exit code 2. Expected 0. Stderr: gio: webdav://localhost:42427/ikzx2R4tRMlW/CRTest: Location is not mountable

at org.cryptomator.ui.model.WebDavVolume.mount(WebDavVolume.java:62)
at org.cryptomator.ui.model.WebDavVolume.mount(WebDavVolume.java:46)
at org.cryptomator.ui.model.Vault.unlock(Vault.java:115)
at org.cryptomator.ui.controllers.UnlockController.lambda$didClickUnlockButton$0(UnlockController.java:494)
at org.cryptomator.ui.util.Tasks.lambda$create$0(Tasks.java:33)
at org.cryptomator.ui.util.Tasks$TaskImpl.call(Tasks.java:139)
at javafx.concurrent.Task$TaskCallable.call(Task.java:1425)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)

Caused by: org.cryptomator.frontend.webdav.mount.Mounter$CommandFailedException: Command failed with exit code 2. Expected 0. Stderr: gio: webdav://localhost:42427/ikzx2R4tRMlW/CRTest: Location is not mountable

at org.cryptomator.frontend.webdav.mount.ProcessUtil.assertExitValue(ProcessUtil.java:28)
at org.cryptomator.frontend.webdav.mount.LinuxGioMounter.mount(LinuxGioMounter.java:39)
at org.cryptomator.frontend.webdav.servlet.WebDavServletController.mount(WebDavServletController.java:102)
at org.cryptomator.ui.model.WebDavVolume.mount(WebDavVolume.java:59)
... 12 common frames omitted

20:38:01.735 [JavaFX Application Thread] INFO org.cryptomator.launcher.Cryptomator - JavaFX application stopped.
20:38:01.746 [main] INFO org.cryptomator.launcher.Cryptomator - Shutting down…
20:38:01.749 [main] DEBUG org.cryptomator.launcher.IpcFactory - [Server] Shut down
20:38:01.776 [Thread-0] DEBUG o.c.launcher.CleanShutdownPerformer - Running graceful shutdown tasks…
20:38:01.824 [Thread-0] INFO o.c.launcher.CleanShutdownPerformer - Goodbye.