Problem mit Flatpack-Version

I have a problem with the Flatpack version.

It isn’t storing the credentials for the new built-in quote provider.

No secure storage modules found.

org.eclipse.equinox.security.storage.StorageException: No secure storage modules found.
	at org.eclipse.equinox.internal.security.storage.PasswordProviderSelector.findStorageModule(PasswordProviderSelector.java:220)
	at org.eclipse.equinox.internal.security.storage.SecurePreferencesRoot.getModulePassword(SecurePreferencesRoot.java:224)
	at org.eclipse.equinox.internal.security.storage.SecurePreferencesRoot.getPassword(SecurePreferencesRoot.java:217)
	at org.eclipse.equinox.internal.security.storage.SecurePreferences.put(SecurePreferences.java:230)
	at org.eclipse.equinox.internal.security.storage.SecurePreferencesWrapper.put(SecurePreferencesWrapper.java:128)
	at name.abuchen.portfolio.oauth.impl.TokenStorage.save(TokenStorage.java:186)
	at name.abuchen.portfolio.oauth.OAuthClient.handleSignInCallback(OAuthClient.java:187)
	at name.abuchen.portfolio.oauth.OAuthClient.lambda$1(OAuthClient.java:126)
	at name.abuchen.portfolio.oauth.impl.CallbackServer.lambda$0(CallbackServer.java:118)
	at name.abuchen.portfolio.oauth.impl.CallbackServer$SuccessHttpHandler.handleResponse(CallbackServer.java:55)
	at name.abuchen.portfolio.oauth.impl.CallbackServer$SuccessHttpHandler.handle(CallbackServer.java:39)
	at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:98)
	at jdk.httpserver/sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:82)
	at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:101)
	at jdk.httpserver/sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:871)
	at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:98)
	at jdk.httpserver/sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:847)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.lang.Thread.run(Thread.java:1583)