I am seeing this in the error logs.
Linux Mint 22.1 fully updated
Version: 0.76.1 (May 2025)
Platform: linux, x86_64
Java: 21.0.7+2, Flathub
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)