# NextCloud 14, Calendar - errors in requests to share links

**URL:** <https://help.nextcloud.com/t/nextcloud-14-calendar-errors-in-requests-to-share-links/43872>\
**Category:** ℹ️ Support\
**Tags:** nc14, calendar-app\
**Created:** [December 24, 2018, 7:16am UTC](https://help.nextcloud.com/t/nextcloud-14-calendar-errors-in-requests-to-share-links/43872 "2018-12-24T07:16:36Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![ChArtem](https://help.nextcloud.com/user_avatar/help.nextcloud.com/chartem/32/13057_2.png) [@ChArtem](https://help.nextcloud.com/u/ChArtem)\
**Post date:** [December 24, 2018, 7:16am UTC](https://help.nextcloud.com/t/nextcloud-14-calendar-errors-in-requests-to-share-links/43872/1 "2018-12-24T07:16:36Z")

</div>

Hello  
We are have:

> [@](#):
>
> Debian 9-x86\_64 (Linux version 4.9.0-8-amd64 )  
> .\ MySQL 5.7.24 - MySQL Community Server (GPL)  
> .\ Apache 2.4.25  
> .\ PHP 7.2.13-1+0~20181207100540.13+stretch~1.gbpf57305  
> .\ UFW 0.35  
> .\ PhpMyAdmin 4.6.6deb4  
> .\ Curl 7.52.1 (x86\_64-pc-linux-gnu) libcurl/7.52.1 OpenSSL/1.0.2l zlib/1.2.8 libidn2/0.16 libpsl/0.17.0 (+libidn2/0.16) libssh2/1.7.0 nghttp2/1.18.1 librtmp/2.3  
> .\ Nextcloud 14.03  
> .\ PHP\_intl 60.2  
> .\ certbot  
> .\ Let’My Encrypt  
> .\ Nginx 1.10.3  
> .\ PostgreSQL 9.4  
> .\ NodeJs 8.12.0  
> .\ gcc g++ 6.3.0  
> .\ yarn 1.12.3

In Nextcloud was installed app the Calendar

> **[GitHub - nextcloud/calendar: 📆 Calendar app for Nextcloud](https://github.com/nextcloud/calendar/)**
>
> 📆 Calendar app for Nextcloud. Contribute to nextcloud/calendar development by creating an account on GitHub.

When created a new calendar, pushed button share link - and send via email to user.  
Now, when user open the link in his browser and push button - “subscribe” - then show pop-up message -  
“Unable to create io-slave. klauncher said: Could not find the ‘kio\_http’ plugin”

And we are have error messeges in log:

```auto
Fatal webdav Sabre\DAV\Exception\BadRequest: Calendar object with uid already exists in this calendar collection.
/var/www/html/3rdparty/sabre/dav/lib/CalDAV/Calendar.php - line 201:

OCA\DAV\CalDAV\CalDavBackend-&gt;createCalendarObject("12", "Nextcloud-K ... s", "BEGIN:VCALE ... R")

/var/www/html/3rdparty/sabre/dav/lib/DAV/Server.php - line 1096:

Sabre\CalDAV\Calendar-&gt;createFile("Nextcloud-K ... s", "BEGIN:VCALE ... R")

/var/www/html/3rdparty/sabre/dav/lib/DAV/CorePlugin.php - line 529:

Sabre\DAV\Server-&gt;createFile("calendars/m ... s", "BEGIN:VCALE ... R", null)

Sabre\DAV\CorePlugin-&gt;httpPut(Sabre\HTTP\R ... "}, Sabre\HTTP\Response {})

/var/www/html/3rdparty/sabre/event/lib/EventEmitterTrait.php - line 105:

call_user_func_array([Sabre\DAV\ ... "], [Sabre\HTTP ... }])

/var/www/html/3rdparty/sabre/dav/lib/DAV/Server.php - line 479:

Sabre\Event\EventEmitter-&gt;emit("method:PUT", [Sabre\HTTP ... }])

/var/www/html/3rdparty/sabre/dav/lib/DAV/Server.php - line 254:

Sabre\DAV\Server-&gt;invokeMethod(Sabre\HTTP\R ... "}, Sabre\HTTP\Response {})

/var/www/html/apps/dav/lib/Server.php - line 293:

Sabre\DAV\Server-&gt;exec()

/var/www/html/apps/dav/appinfo/v2/remote.php - line 35:

OCA\DAV\Server-&gt;exec()

/var/www/html/remote.php - line 163:

require_once("/var/www/ht ... p")
```

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_[View the full topic](https://help.nextcloud.com/t/nextcloud-14-calendar-errors-in-requests-to-share-links/43872)._