Class CardDavBackend does not exist after upgrade to NC11

[mr-gosh]

Steps to reproduce

1. Upgrade fully patched Nextcloud 10 to 11 without errors
2. try to sync any DAV related resources
3. look into logs to see missing stuff

Expected behaviour

Tell us what should happen

Sync of caldav, carddav aso. Should just work

Actual behaviour

Tell us what happens instead

No dav syncs possible and an error in the owncloud log

Server configuration

Operating system:
Ubuntu 14.04 64bit
Web server:
Apache 2.4.7
Database:
Mysql 5.5.53
PHP version:
7.0.14
Nextcloud version: (see Nextcloud admin page)
11.0.0
Updated from an older Nextcloud/ownCloud or fresh install:
Updated from 10.0.2
Where did you install Nextcloud from:
Tar.gz from your website
Signing status:

Signing status

No errors have been found.

List of activated apps:

App list

app:list
Enabled:
  - activity: 2.4.1
  - admin_audit: 1.1.0
  - calendar: 1.4.1
  - comments: 1.1.0
  - contacts: 1.5.2
  - dav: 1.1.1
  - direct_menu: 0.9.3
  - federatedfilesharing: 1.1.1
  - federation: 1.1.1
  - files: 1.6.1
  - files_accesscontrol: 1.1.2
  - files_automatedtagging: 1.1.1
  - files_external: 1.1.2
  - files_pdfviewer: 1.0.1
  - files_sharing: 1.1.1
  - files_texteditor: 2.2
  - files_trashbin: 1.1.0
  - files_versions: 1.4.0
  - files_videoplayer: 1.0.0
  - firstrunwizard: 2.0
  - gallery: 16.0.0
  - logreader: 2.0.0
  - lookup_server_connector: 1.0.0
  - news: 10.1.0
  - nextcloud_announcements: 1.0
  - notes: 2.1.0
  - notifications: 1.0.1
  - password_policy: 1.1.0
  - provisioning_api: 1.1.0
  - serverinfo: 1.1.1
  - sharebymail: 1.0.1
  - survey_client: 0.1.5
  - systemtags: 1.1.3
  - tasks: 0.9.4
  - templateeditor: 0.2
  - theming: 1.1.1
  - twofactor_backupcodes: 1.0.0
  - updatenotification: 1.1.1
  - workflowengine: 1.1.1
Disabled:
  - encryption
  - external
  - files_retention
  - music
  - ownnote
  - user_external
  - user_ldap
  - user_saml

The content of config/config.php:

Config report

{
    "system": {
        "instanceid": "oclb6yyk0div",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "Changed"
        ],
        "datadirectory": "\/media\/4tb\/owncloud\/",
        "overwrite.cli.url": "http:\/\/changed\/owncloud",
        "dbtype": "mysql",
        "version": "11.0.0.10",
        "dbname": "owncloud",
        "dbhost": "localhost",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "logtimezone": "UTC",
        "installed": true,
        "maintenance": false,
        "theme": "",
        "loglevel": 2,
        "trashbin_retention_obligation": "auto",
        "updatechecker": false,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "mail_from_address": "changes",
        "mail_smtpmode": "php",
        "mail_domain": "changed",
        "htaccess.RewriteBase": "\/",
        "appstore.experimental.enabled": true,
        "updater.release.channel": "stable"
    }
}

Are you using external storage, if yes which one: local/smb/sftp/...
Yes - lokal
Are you using encryption: yes/no
No
Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/
Nope

Logs

Web server error log

Web server error log

``` Insert your webserver log here ```

Nextcloud log (data/nextcloud.log)

Nextcloud log

``` emty ```

Browser log

Browser log

``` Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log
c) ...

</details>

[nickvergessen]

File apps/dav/appinfo/register_command.php does not exist anymore in Nextcloud 11.
Seems like you didn't remove all files before uploading the new files.

See https://docs.nextcloud.com/server/10/admin_manual/maintenance/manual_upgrade.html step 3 and the following

[mr-gosh]

I repeated the whole thing once again and this time i didn't copy the missing apps from the apps folder - so the only copied thing is the config file.

Still the same!

[nickvergessen]

Do you still have apps/dav/appinfo/register_command.php in your folder?

[mr-gosh]

nope - also the nextcloud log es empty and the apache error log shows nothing...

it seems that everythign is working but no caldav or carddav sync is discoverable anymore...
I there only have the error logs from davdroid... :(

in evolution i get an "HTTP Error: Method Not Allowed"

[papjul]

I can confirm the same issue, with the same steps to upgrade, DAVDroid doesn't work for me neither. It was working in Nextcloud 10.0.2. I also updated my nginx config according to latest docs. DAVDroid says 404 Not Found.
It is looking for https://{mycloud}/remote.php/caldav/calendars/{Username}/defaultcalendar/ and https://{mycloud}/remote.php/carddav/addressbooks/{Username}/contacts/.

[mr-gosh]

perhaps its a combination of changes in nextcloud 11 / apache2 / dav autodiscovery?

i am using LetsEncrypt...

[papjul]

We use different HTTP servers. I also use Let's encrypt but the error is a 404 in DAVDroid, not an issue with the certificate.
Maybe URLs changed? Like the default calendar's name changed?

[mr-gosh]

@papjul after you mentioned the renaming of the calendars I deleted all caledars from evolution and than i can re-add them after posting the whole string - so it more likely a auto discovery problem cause some detection things do not work anymore as before...

i will try a few things in davdroid again now.

[mr-gosh]

it seems it works if you delete the whole account in davdroid and recreate it with the https://yourdomain/remote.php/dav

@papjul can you confirm this?

[papjul]

Confirmed but I used the configure tool from Nextcloud Android app to recreate the DAVDroid account. Can we reopen this bug and change the title?

[mr-gosh]

Still the same after an DavDroid update.
Massive problems with carddav sync.

[kesselb]

Does this error still occur?

[mr-gosh]

Not for me, else won't be able to use nextcloud anymore...