I use Cryptomator on Windows (Dokany mode because webdav doesn’t work before some version) and Android with a webdav vault
On Android 11 (v. 1.6.8), i can’t rename a file or a folder, i have a message error. Before i don’t have any issue with this.
I try on another smarphone (Android 11 and Android 10), i create i new vault and the issue is the same.
And what does the message say?
On log file
D 20220105212006.168 RenameFolderUseCase failed 2be05354
D 20220105212006.168 ExceptionHandler Unexpected error
org.cryptomator.domain.exception.NotFoundException
at org.cryptomator.data.cloud.webdav.network.WebDavClient.move(WebDavClient.kt:112)
at org.cryptomator.data.cloud.webdav.network.ConnectionHandlerHandlerImpl.move(ConnectionHandlerHandlerImpl.kt:21)
at org.cryptomator.data.cloud.webdav.WebDavImpl.moveFileOrFolder(WebDavImpl.kt:115)
at org.cryptomator.data.cloud.webdav.WebDavImpl.move(WebDavImpl.kt:106)
at org.cryptomator.data.cloud.webdav.WebDavCloudContentRepository$Intercepted.move(WebDavCloudContentRepository.kt:159)
at org.cryptomator.data.cloud.webdav.WebDavCloudContentRepository$Intercepted.move(WebDavCloudContentRepository.kt:95)
at org.cryptomator.data.cloud.InterceptingCloudContentRepository.move(InterceptingCloudContentRepository.kt:142)
at org.cryptomator.data.repository.DispatchingCloudContentRepository.move(DispatchingCloudContentRepository.kt:138)
at org.cryptomator.data.cloud.crypto.CryptoImplVaultFormat7.move(CryptoImplVaultFormat7.kt:346)
at org.cryptomator.data.cloud.crypto.CryptoCloudContentRepository.move(CryptoCloudContentRepository.kt:73)
at org.cryptomator.data.cloud.crypto.CryptoCloudContentRepository.move(CryptoCloudContentRepository.kt:21)
at org.cryptomator.data.repository.DispatchingCloudContentRepository.move(DispatchingCloudContentRepository.kt:126)
at org.cryptomator.domain.usecases.cloud.RenameFolder.execute(RenameFolder.java:26)
at org.cryptomator.domain.usecases.cloud.RenameFolderUseCase$Launcher$2.call(RenameFolderUseCase.java:101)
at org.cryptomator.domain.usecases.cloud.RenameFolderUseCase$Launcher$2.call(RenameFolderUseCase.java:95)
at io.reactivex.internal.operators.flowable.FlowableFromCallable.subscribeActual(FlowableFromCallable.java:39)
at io.reactivex.Flowable.subscribe(Flowable.java:14935)
at io.reactivex.Flowable.subscribe(Flowable.java:14882)
at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run(FlowableSubscribeOn.java:82)
at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker$BooleanRunnable.run(ExecutorScheduler.java:288)
at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker.run(ExecutorScheduler.java:253)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:923)
ErrorCode: PJ9R:9QU0
E 20220105212006.169 ExceptionHandler org.cryptomator.domain.exception.NotFoundException
at org.cryptomator.data.cloud.webdav.network.WebDavClient.move(WebDavClient.kt:112)
at org.cryptomator.data.cloud.webdav.network.ConnectionHandlerHandlerImpl.move(ConnectionHandlerHandlerImpl.kt:21)
at org.cryptomator.data.cloud.webdav.WebDavImpl.moveFileOrFolder(WebDavImpl.kt:115)
at org.cryptomator.data.cloud.webdav.WebDavImpl.move(WebDavImpl.kt:106)
at org.cryptomator.data.cloud.webdav.WebDavCloudContentRepository$Intercepted.move(WebDavCloudContentRepository.kt:159)
at org.cryptomator.data.cloud.webdav.WebDavCloudContentRepository$Intercepted.move(WebDavCloudContentRepository.kt:95)
at org.cryptomator.data.cloud.InterceptingCloudContentRepository.move(InterceptingCloudContentRepository.kt:142)
at org.cryptomator.data.repository.DispatchingCloudContentRepository.move(DispatchingCloudContentRepository.kt:138)
at org.cryptomator.data.cloud.crypto.CryptoImplVaultFormat7.move(CryptoImplVaultFormat7.kt:346)
at org.cryptomator.data.cloud.crypto.CryptoCloudContentRepository.move(CryptoCloudContentRepository.kt:73)
at org.cryptomator.data.cloud.crypto.CryptoCloudContentRepository.move(CryptoCloudContentRepository.kt:21)
at org.cryptomator.data.repository.DispatchingCloudContentRepository.move(DispatchingCloudContentRepository.kt:126)
at org.cryptomator.domain.usecases.cloud.RenameFolder.execute(RenameFolder.java:26)
at org.cryptomator.domain.usecases.cloud.RenameFolderUseCase$Launcher$2.call(RenameFolderUseCase.java:101)
at org.cryptomator.domain.usecases.cloud.RenameFolderUseCase$Launcher$2.call(RenameFolderUseCase.java:95)
at io.reactivex.internal.operators.flowable.FlowableFromCallable.subscribeActual(FlowableFromCallable.java:39)
at io.reactivex.Flowable.subscribe(Flowable.java:14935)
at io.reactivex.Flowable.subscribe(Flowable.java:14882)
at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run(FlowableSubscribeOn.java:82)
at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker$BooleanRunnable.run(ExecutorScheduler.java:288)
at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker.run(ExecutorScheduler.java:253)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:923)
ErrorCode: PJ9R:9QU0
W 20220105212006.171 Message Une erreur est survenue
And thank you for your interest 
Thanks for the log and sorry for the late response.
Did I understand that correctly, that you can reproducible create a new vault, create a folder inside this new vault and when you try to rename the folder, you get this message?
I’m asking because from the stack trace it is possible to say, that moving the dir-file (every folder in Cryptomator’s crypto scheme have a folder ending with “c9r” and inside this folder is a “dir.c9r”-file) fails because according to the cloud, it doesn’t exists.
If you open this RenameTest folder (click on it in the Android app), I highly assume that you get a dialog with the title “Unable to load contents of directory”?
One last question: What kind of WebDAV cloud do you use?
Yes
Yes too
I found why doesn’t work.
My Webdav server is on my Synology NAS. I recently activate the reverse proxy option in DSM 7. When i open my Vault through the reverse proxy, i have this error. When i open directly on Webdav serveur with the dedicated port open on my routeur, i don’t have this issue.
Thanks for your help
Thanks for sharing your research.
The question remains what is failing in the creation of the dir-files or why the NAS thinks that this file does not exist, but then it looks like a problem of the proxy and not of Cryptomator.
Yes,
If I find something that helps me figure out why it’s not working I’ll share it here just in case
This is my route :
https://subdomain.domain.com:XXXX → CNAME Dynamic DNS → Let’s encrypt certificat on Synology / reverse proxy on localhost http port of webdav serveur
If you see this “Unable to load contents of directory” dialog and follow the path using a file browser on the NAS, does this file exists there? In the NAS if you browse one folder up in the cipher files and create a new folder using the Android app, a new folder should appear, if you navigate into the new folder, does this one contain a dir.c9r file?
Okay, so only the move of the dir.c9r file to the new folder fails. Hmmmm if an existing file is moved from foo to bar and leads to a response foo does not exist from the cloud, but in a folder listing foo exists, but this move-fail only happens with the reverse proxy I have no idea what the reason could be 
I can create, read, upload and download but not rename or move any file
Ok i found a new thing
This is my route : -Doesn’t work-
https://subdomain.domain.com:XXXX → CNAME Dynamic DNS → Let’s encrypt certificat on Synology / reverse proxy on localhost http port of webdav serveur
This is my route : -Work-
https://subdomain.domain.com:XXXX → CNAME Dynamic DNS → Let’s encrypt certificat on Synology / reverse proxy on localhost httpS port of webdav serveur
