Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 24.0.7 - Nextcloud AIO - Docker
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04
Apache or nginx version (eg, Apache 2.4.25): NGinX Proxy Manager for Reverse Proxy, Apache in AIO
PHP version (eg, 7.4): whatever version is in Docker for AIO
The issue you are facing:
I created a calendar (calendar name = Family), and added a group to that calendar (group = Family), and gave the group edit permissions. I am part of that group (my user is).
I want to add an event to that shared calendar (Family), but don’t see any way to select that calendar. When I add an event it always is assigned to my personal calendar instead.
I tried the following:
- Log out, close the browser, log back into nextcloud.
- Refresh browser.
- Disable all other calendars except the Family calendar.
- Watched a Youtube video that showed the event creation dialog with a field to select the calendar. I do not have this field on my event creation dialog, nor is it shown in the ‘more’ view.
Is this the first time you’ve seen this error? (Y/N): Yes
Steps to replicate it:
- Create a Group, and add members to the group, including yourself.
- Create a new calendar, and share it with that group, and give the group edit permissions.
- Try to create an event on that specific calendar.
The output of your Nextcloud log in Admin > Logging:
PASTE HERE
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
[core] Error: Error: Object of class OC\User\User could not be converted to string at <<closure>>
0. /var/www/html/lib/private/Log.php line 402
strtr("Failed sending ... "", ["Swift_Transpor ... "])
1. /var/www/html/lib/private/Log.php line 323
OC\Log->interpolateMessage(["Swift_Transpor ... "], "Failed sending ... "", "CustomMessage")
2. /var/www/html/lib/private/AppFramework/Logger.php line 125
OC\Log->logException(Swift_TransportException {}, ["Failed sending ... "])
3. /var/www/html/apps/activity/lib/MailQueueHandler.php line 420
OC\AppFramework\Logger->logException(Swift_TransportException {}, ["Failed sending ... "])
4. /var/www/html/apps/activity/lib/MailQueueHandler.php line 165
OCA\Activity\MailQueueHandler->sendEmailToUser("brian", "brian@fixitdelrio.com", "en", "America/Chicago", 1671052806)
5. /var/www/html/apps/activity/lib/BackgroundJob/EmailNotification.php line 61
OCA\Activity\MailQueueHandler->sendEmails(500, 1671052806)
6. /var/www/html/lib/private/BackgroundJob/Job.php line 54
OCA\Activity\BackgroundJob\EmailNotification->run(null)
7. /var/www/html/lib/private/BackgroundJob/TimedJob.php line 60
OC\BackgroundJob\Job->execute(OC\BackgroundJob\JobList {}, OC\Log {})
8. /var/www/html/cron.php line 151
OC\BackgroundJob\TimedJob->execute(OC\BackgroundJob\JobList {}, OC\Log {})
at 2022-12-14T21:20:07+00:00
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE
PASTE HERE
Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
PASTE HERE