NC 20.0.7 - 20.0.7.1 Update: Calendar, Addressbook etc disabled

After reporting this as a bug, I was referred to here.

https://github.com/nextcloud/server/issues/25559

I was running 20.0.1 (in a freenas/truenas/freebsd iocage). Wanting to remove some apps, I noticed the apps were not accessible: just a spinning icon after clicking. As the update to 20.0.7 was suggested, I tried. That failed multiple times at different places. So I started the manual update, which worked though also with glitches. The browser UI wanted to restart the update by itself. That eventually stopped.

During the update several relevant apps were disabled as incompatible: Address book, Calendar, etc.

Checking for new apps via browser UI, none of those were available. As a matter of fact, most apps had disappeared.

Considering that CalDAV and CardDAV are my key reasons for using Nextcloud, this a dead end. The file/cloud section still is working.

What is going on? Core features gone by updating? What to do to get out of the mess?

Operating system: FreeBSD 12.2-RELEASE-p2 FreeBSD 12.2-RELEASE-p2 663e6b09467(HEAD) TRUENAS amd64

Webserver: Apache/2.4.46 (FreeBSD) OpenSSL/1.1.1h-freebsd (fpm-fcgi)

Database: mysql 5.7.33

PHP version: 7.4.15

Modules loaded: Core, date, libxml, pcre, hash, Reflection, SPL, session, standard, cgi-fcgi, mysqlnd, apcu, bcmath, bz2, ctype, curl, dom, mbstring, fileinfo, filter, gd, gmp, iconv, imagick, intl, json, ldap, exif, mysqli, openssl, PDO, posix, SimpleXML, xml, xmlwriter, zip, zlib, pdo_mysql, redis, xmlreader, xsl, Zend OPcache

Nextcloud version: 20.0.7 - 20.0.7.1

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

{
    "instanceid": "***REMOVED SENSITIVE VALUE***",
    "passwordsalt": "***REMOVED SENSITIVE VALUE***",
    "secret": "***REMOVED SENSITIVE VALUE***",
    "trusted_domains": [
        "10.0.1.44"
    ],
    "datadirectory": "***REMOVED SENSITIVE VALUE***",
    "dbtype": "mysql",
    "version": "20.0.7.1",
    "overwrite.cli.url": "http:\/\/10.0.1.44",
    "dbname": "***REMOVED SENSITIVE VALUE***",
    "dbhost": "***REMOVED SENSITIVE VALUE***",
    "dbport": "",
    "dbtableprefix": "oc_",
    "mysql.utf8mb4": true,
    "dbuser": "***REMOVED SENSITIVE VALUE***",
    "dbpassword": "***REMOVED SENSITIVE VALUE***",
    "installed": true,
    "redis": {
        "host": "***REMOVED SENSITIVE VALUE***",
        "port": 0
    },
    "memcache.local": "\\OC\\Memcache\\APCu",
    "memcache.locking": "\\OC\\Memcache\\Redis",
    "mail_from_address": "***REMOVED SENSITIVE VALUE***",
    "mail_smtpmode": "smtp",
    "mail_sendmailmode": "smtp",
    "mail_domain": "***REMOVED SENSITIVE VALUE***",
    "mail_smtpauthtype": "LOGIN",
    "mail_smtpauth": 1,
    "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
    "mail_smtpport": "587",
    "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
    "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
    "mail_smtpsecure": "tls",
    "maintenance": false,
    "theme": "",
    "loglevel": 0,
    "updater.secret": "***REMOVED SENSITIVE VALUE***"
}