**Describe the bug**
When deck is enabled one of our users can not access the… calendar and task apps. I'm not sure what causes this. Other users are not affected (afaik). The log reads:
```
{...,"app":"webdav","method":"PROPFIND","url":"/remote.php/dav/calendars/username/","message":{"Exception":"OCA\\Deck\\NoPermissionException","Message":"Permission denied","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/deck/lib/Service/CardService.php","line":148,"function":"checkPermission","class":"OCA\\Deck\\Service\\PermissionService","type":"->"},{"file":"/var/www/nextcloud/apps/deck/lib/DAV/DeckCalendarBackend.php","line":85,"function":"findCalendarEntries","class":"OCA\\Deck\\Service\\CardService","type":"->"},{"file":"/var/www/nextcloud/apps/deck/lib/DAV/Calendar.php","line":57,"function":"getChildren","class":"OCA\\Deck\\DAV\\DeckCalendarBackend","type":"->"},{"file":"/var/www/nextcloud/apps/deck/lib/DAV/CalendarPlugin.php","line":54,"function":"__construct","class":"OCA\\Deck\\DAV\\Calendar","type":"->"},{"function":"OCA\\Deck\\DAV\\{closure}","class":"OCA\\Deck\\DAV\\CalendarPlugin","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/deck/lib/DAV/CalendarPlugin.php","line":55,"function":"array_map"},{"file":"/var/www/nextcloud/apps/dav/lib/CalDAV/CalendarHome.php","line":120,"function":"fetchAllForCalendarHome","class":"OCA\\Deck\\DAV\\CalendarPlugin","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php","line":204,"function":"getChildren","class":"OCA\\DAV\\CalDAV\\CalendarHome","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":905,"function":"getChildren","class":"Sabre\\DAV\\Tree","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":987,"function":"generatePathNodes","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1678,"function":"getPropertiesIteratorForPath","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1661,"function":"writeMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":363,"function":"generateMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPropFind","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":474,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":251,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":319,"function":"start","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Server.php","line":320,"function":"exec","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/remote.php","line":167,"args":["/var/www/nextcloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/var/www/nextcloud/apps/deck/lib/Service/PermissionService.php","Line":159,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36","version":"19.0.4.2"}
```
**Screenshots**
![image](https://user-images.githubusercontent.com/60790040/95736239-3fc5a300-0c86-11eb-9c60-83cda84d83ae.png)
**Client details:**
Tried Firefox and Chrome on Windows 10 and Firefox on Ubuntu 20.04
<details>
<summary>Server details</summary>
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**Operating system**: Linux 5.4.0-33-generic #37-Ubuntu SMP Thu May 21 12:53:59 UTC 2020 x86_64
**Web server:** Apache (fpm-fcgi)
**Database:** pgsql PostgreSQL 12.4 (Ubuntu 12.4-0ubuntu0.20.04.1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0, 64-bit
**PHP version:** 7.4.3
Modules loaded: Core, date, libxml, openssl, pcre, zlib, filter, hash, Reflection, SPL, session, standard, sodium, cgi-fcgi, json, apcu, igbinary, PDO, xml, bcmath, bz2, calendar, ctype, curl, dom, mbstring, FFI, fileinfo, ftp, gd, gettext, gmp, iconv, imagick, imap, intl, redis, ldap, exif, pdo_pgsql, pgsql, Phar, posix, readline, shmop, SimpleXML, smbclient, soap, sockets, sysvmsg, sysvsem, sysvshm, tokenizer, xmlreader, xmlwriter, xsl, zip, libsmbclient, Zend OPcache
**Nextcloud version:** 19.0.4 - 19.0.4.2
**Where did you install Nextcloud from:** Official vm install script
</details>