An Error Occured While Opening Folder Unknown Error

Getting an error that occurred after adding another account in my client.

I've uninstalled and reinstalled the client, deleted the folders on the client machine, restarted etc. Client remains in startup tasks as "Program" after uninstall.

I can't sync when I setup the client with these two users on another machine.

Steps to reproduce
1. Add a user.
2. Add another user with different local folder.

Not sure that's going to do it for everyone.

Expected behaviour
Client should sync.

Actual behaviour
Client says "An Error Occured While Opening Folder Unknown Error."

Client configuration
Client version:
Client operating system: Win 10 x64

Server configuration
Operating system: Ubuntu 16.04.1 LTS
Web server: Apache 2.4.18
Database: mysql 5.7.17
PHP version: 7.0.8
ownCloud version (see ownCloud admin page): ownCloud 9.1.3 (stable)
Updated from an older ownCloud or fresh install: fresh
Special configurations (external storage, external authentication, reverse proxy, server-side-encryption): Storage is mounted out side of /var/www/owncloud, LDAP and ownCloud accounts, no reverse proxy, no server side encryption

ownCloud log (data/owncloud.log)

No errors in PHP log or apache error log or client log.

EDIT: Got some info running with --logwindow. See share link:


All I'm getting in the apache access log is: - andreww [21/Feb/2017:11:57:42 -0500] "GET /ocs/v2.php/apps/notifications/api/v1/notifications?format=json HTTP/1.1" 200 2345 "-" "Mozilla/5.0 (Windows) mirall/2.2.4 (build 6408)" - andreww [21/Feb/2017:11:57:42 -0500] "GET /ocs/v1.php/cloud/activity?page=0&pagesize=100&format=json HTTP/1.1" 200 7830 "-" "Mozilla/5.0 (Windows) mirall/2.2.4 (build 6408)"


I can webdav fine.

And the web-interface is working fine as well?

@dragotin @guruz

Yeah, I think figured it out. The way I had the redirection setup in Apache wasn't working after I added the second account. When I switched to using the server's fqdn and path it was fine.

However, there are some issues I exposed during this, not sure where or if I should post those.

1) The service doesn't uninstall and remains in task manager as "Program."
2) The account persists after uninstall and is automatically added on install.
3) I could create folders even though I was referencing the wrong location.
4) The Error message is really unclear.

Please post issues and possible improvements directly to the bugtracker on