Support intro
Sorry to hear you’re facing problems. 
The community help forum (help.nextcloud.com) is for home and non-enterprise users. Support is provided by other community members on a best effort / “as available” basis. All of those responding are volunteering their time to help you.
If you’re using Nextcloud in a business/critical setting, paid and SLA-based support services can be accessed via portal.nextcloud.com where Nextcloud engineers can help ensure your business keeps running smoothly.
Getting help
In order to help you as efficiently (and quickly!) as possible, please fill in as much of the below requested information as you can.
Before clicking submit: Please check if your query is already addressed via the following resources:
Nobody has answered this in a way that actually solves the problem.
(Utilizing these existing resources is typically faster. It also helps reduce the load on our generous volunteers while elevating the signal to noise ratio of the forums otherwise arising from the same queries being posted repeatedly).
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. 
The Basics
- Nextcloud Server version (e.g., 29.x.x):
- [Nextcloud Hub 10] (31.0.3)**
- Operating system and version (e.g., Ubuntu 24.04):
Ubuntu.24.04.1 - Web server and version (e.g, Apache 2.4.25):
apache2 - 2.4 - Reverse proxy and version _(e.g. nginx 1.27.2)
None. - PHP version (e.g, 8.3):
8.3 - Is this the first time you’ve seen this error? (Yes / No):
No. - When did this problem seem to first start?
Nextcloud hub 10. - Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
Loaded to apache2 - Are you using CloudfIare, mod_security, or similar? (Yes / No)
No
Summary of the issue you are facing:
Calendar invites are not sent in Nextcloud.
Steps to replicate it (hint: details matter!):
- Open thunderbird.
- Make a invite in calendar.
- Calendar is synced with cloud, does not sent invites.
Log entries
None.
Nextcloud
None avaliable.
#### Web Browser
None.
#### Web server / Reverse Proxy
The output of your Apache/nginx/system log in `/var/log/____`:
Which one, this question is nonsensical.
### Configuration
#### Nextcloud
The output of `occ config:list system` or similar is best, but, if not possible, the contents of your `config.php` file from `/path/to/nextcloud` is fine (make sure to remove any identifiable information!):
sudo: occ: command not found
#### Apps
sudo: occ: command not found
### Tips for increasing the likelihood of a response
* Use the `preformatted text` formatting option in the editor for all log entries and configuration output.
* If screenshots are useful, feel free to include them.
- If possible, also include key error output in text form so it can be searched for.
* Try to edit log output only minimally (if at all) so that it can be ran through analyzers / formatters by those trying to help you.