Unable to open Vault: CRITICAL - Check failed: Traversal of data dir failed. See log for details

Hello

I’m hitting an issue with opening a 2TB vault that I haven’t touched in a couple of months. It wouldn’t open, so I ran health check. It threw the error: CRITICAL - Check failed: Traversal of data dir failed. See log for details.

The resulting log file didn’t show anything that pointed to a specific cause. The Directory check shows only the error message, while Resource & Shortened Names all say Good, except for the last line with the same error.

A backup of the vault exhibits the exact same issue.

I usually use MacFUSE. I updated it to 5.2.0, but it didn’t fix the issue. I tried FUSE-T, with the most current build through Homebrew. In that case, it mounts the volume but the window shows no files.

Details:

  • Mac OS 26.4.1
  • MacFuse 5.2.0
  • FUSE-T 1.2.6

I’m looking for ideas on how to fix the issue and access the vault. Other vaults I have work perfectly.

Thanks

-Mike

=========

Error when attempting to mount:

Error Code 4VHF:Q9JM:SGVO
org.cryptomator.integrations.mount.MountFailedException: org.cryptomator.jfuse.api.FuseMountFailedException: fuse_mount failed
	at org.cryptomator.frontend.fuse@6.0.1/org.cryptomator.frontend.fuse.mount.MacFuseMountProvider$MacFuseMountBuilder.mount(MacFuseMountProvider.java:145)
	at org.cryptomator.desktop@1.19.2/org.cryptomator.common.mount.Mounter.mount(Mounter.java:173)
	at org.cryptomator.desktop@1.19.2/org.cryptomator.common.vaults.Vault.unlock(Vault.java:187)
	at org.cryptomator.desktop@1.19.2/org.cryptomator.ui.keyloading.KeyLoadingStrategy.use(KeyLoadingStrategy.java:109)
	at org.cryptomator.desktop@1.19.2/org.cryptomator.ui.unlock.UnlockWorkflow.call(UnlockWorkflow.java:82)
	at org.cryptomator.desktop@1.19.2/org.cryptomator.ui.unlock.UnlockWorkflow.call(UnlockWorkflow.java:37)
	at javafx.graphics@25.0.2/javafx.concurrent.Task$TaskCallable.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture$UniAccept.tryFire(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture$Completion.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: org.cryptomator.jfuse.api.FuseMountFailedException: fuse_mount failed
	at org.cryptomator.jfuse.mac@0.7.3/org.cryptomator.jfuse.mac.FuseImpl.mount(FuseImpl.java:33)
	at org.cryptomator.jfuse.api@0.7.3/org.cryptomator.jfuse.api.Fuse.mount(Fuse.java:126)
	at org.cryptomator.frontend.fuse@6.0.1/org.cryptomator.frontend.fuse.mount.MacFuseMountProvider$MacFuseMountBuilder.mount(MacFuseMountProvider.java:142)
	... 12 more