# Calendar Not Displaying at All **URL:** \ **Category:** ℹ️ Support\ **Tags:** reverseproxy, app\_api, proxmox, cloudflare, nc31, calendar-app, setup\_warning\ **Created:** [December 19, 2025, 9:46am UTC](https://help.nextcloud.com/t/calendar-not-displaying-at-all/237599 "2025-12-19T09:46:05Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Multipass](https://help.nextcloud.com/letter_avatar/multipass/32/6_22734026db12803ebb3e059622ac3534.png) [@Multipass](https://help.nextcloud.com/u/Multipass)\ **Post date:** [December 19, 2025, 9:46am UTC](https://help.nextcloud.com/t/calendar-not-displaying-at-all/237599/1 "2025-12-19T09:46:06Z")
## The Basics - Nextcloud Server version _(e.g., 29.x.x)_: - `31.0.9` - Operating system and version _(e.g., Ubuntu 24.04)_: - Linux 6.1.0-41-amd64 x86\_64 (Debian 12, bookworm) - Web server and version _(e.g, Apache 2.4.25)_: - PostgreSQL 15.14 - Reverse proxy and version \_(e.g. nginx 1.27.2) - nginx/1.28.0 (twice ie one is the main gatekeeping for other elements/sites/tools, and pass the info, the other one which is the nextcloud one with all the fastgci, location, etc… parameters) - PHP version _(e.g, 8.3)_: - 8.3.25 - Is this the first time you’ve seen this error? (Yes / No): - `It never worked` - Installation method _(e.g. AlO, NCP, Bare Metal/Archive, etc.)_ - - `docker (in a VM, on proxmox)` - Are you using CloudfIare, mod\_security, or similar? _(Yes / No)_ - `using Cloudflare` ### Summary of the issue you are facing: On the “home page”, the icon of the calendar is not displaying (it’s there with a placeholder for the picture which is not displayed). Clicking on it shows an empty page. So I can’t do anything in the calendar obviously. #### Web Browser In the browser (Brave) console I have those GET errors : ```auto Can't find www.mydomaincom/custom_apps/calendar/js/calendar-contacts-menu.js?v=62c98b92-0’ because its MIME type (‘text/html’) is not executable, and strict MIME type checking is enabled. ``` then ```auto error with ``static.coudflareinsights.com/beacon.min.js`` cause blocked by client Can't find www.mydomain.com/custom_apps/calendar/js/calendar-main.js?v=62c98b92-0’ because its MIME type (‘text/html’) is not executable, and strict MIME type checking is enabled. ``` and ```auto Failed to load resource: the server responded with a status of 404 () forcalendar.svg ``` (this one is the icone I guess) Now, I think this is accounted for, but just mentionning as well that the url shows : `www.mydomain.com/` **apps** /calendar/` But I can see in the console that it is trying to pick up the data in the correct subfolder ie `www.mydomain.com/` **custom\_apps** /calendar/ #### Nextcloud logs I do have few warnings, but not sure they’re related (although…) **On the overview :** ```auto `Some headers are not set correctly on your instance - The `Strict-Transport-Security` HTTP header is not set to at least `15552000` seconds (current value: `0`). For enhanced security, it is recommended to use a long HSTS policy.` ``` –\> this is by design so to speak, I read the possible challenges using HSTS, so I’d rather not “activate” the whole thing, **BUT** I just saw that it’s active on the cloudflare side, could this be an issue ? **I also have PHP warning in the logs :** ```auto dns_get_record(): A temporary server error occurred. at /var/www/html/lib/private/Http/Client/DnsPinMiddleware.php#99 ``` | `Cannot modify header information - headers already sent by (output started at /var/www/html/3rdparty/deepdiver/zipstreamer/src/ZipStreamer.php:325) at /var/www/html/3rdparty/sabre/http/lib/Sapi.php#70` | | | --- | --- | #### Nginx Both Nginx (the main one → to nextcloud VM and the nextcloud one) : all entries shows 200 status, except the notification one : `GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.0" 304` ### Configuration #### Nextcloud ```auto { "system": { "memcache.local": "\\OC\\Memcache\\APCu", "apps_paths": [ { "path": "\/var\/www\/html\/apps", "url": "\/apps", "writable": false }, { "path": "\/var\/www\/html\/custom_apps", "url": "\/custom_apps", "writable": true } ], "memcache.distributed": "\\OC\\Memcache\\Redis", "memcache.locking": "\\OC\\Memcache\\Redis", "redis": { "host": " ***REMOVED SENSITIVE VALUE***", "password": " ***REMOVED SENSITIVE VALUE***", "port": 6379 }, "upgrade.disable-web": true, "passwordsalt": " ***REMOVED SENSITIVE VALUE***", "secret": " ***REMOVED SENSITIVE VALUE***", "trusted_domains": [ "localhost", "edengarden.connexsens.org", "192.168.1.15", "192.168.1.41" ], "datadirectory": " ***REMOVED SENSITIVE VALUE***", "dbtype": "pgsql", "version": "31.0.9.1", "overwrite.cli.url": "https:\/\/edengarden.connexsens.org", "dbname": " ***REMOVED SENSITIVE VALUE***", "dbhost": " ***REMOVED SENSITIVE VALUE***", "dbport": "", "dbtableprefix": "oc_", "dbuser": " ***REMOVED SENSITIVE VALUE***", "dbpassword": " ***REMOVED SENSITIVE VALUE***", "installed": true, "instanceid": " ***REMOVED SENSITIVE VALUE***", "maintenance_window_start": 1, "loglevel": 2, "maintenance": false, "default_phone_region": "FR", "app_install_overwrite": [] } } ``` #### Apps ```auto Enabled: - activity: 4.0.0 - app_api: 5.0.2 - bruteforcesettings: 4.0.0 - calendar: 5.5.10 - circles: 31.0.0 - cloud_federation_api: 1.14.0 - comments: 1.21.0 - contactsinteraction: 1.12.0 - dashboard: 7.11.0 - dav: 1.33.0 - federatedfilesharing: 1.21.0 - federation: 1.21.0 - files: 2.3.1 - files_downloadlimit: 4.0.0 - files_external: 1.23.0 - files_pdfviewer: 4.0.0 - files_reminders: 1.4.0 - files_sharing: 1.23.1 - files_trashbin: 1.21.0 - files_versions: 1.24.0 - firstrunwizard: 4.0.0 - logreader: 4.0.0 - lookup_server_connector: 1.19.0 - nextcloud_announcements: 3.0.0 - notifications: 4.0.0 - oauth2: 1.19.1 - password_policy: 3.0.0 - photos: 4.0.0 - privacy: 3.0.0 - profile: 1.0.0 - provisioning_api: 1.21.0 - recommendations: 4.0.0 - related_resources: 2.0.0 - richdocuments: 8.7.7 - serverinfo: 3.0.0 - settings: 1.14.0 - sharebymail: 1.21.0 - support: 3.0.0 - survey_client: 3.0.0 - systemtags: 1.21.1 - text: 5.0.0 - theming: 2.6.1 - twofactor_backupcodes: 1.20.0 - updatenotification: 1.21.0 - user_status: 1.11.0 - viewer: 4.0.0 - webhook_listeners: 1.2.0 - workflowengine: 2.13.0 Disabled: - admin_audit: 1.21.0 - encryption: 2.19.0 - suspicious_login: 9.0.1 - twofactor_nextcloud_notification: 5.0.0 - twofactor_totp: 13.0.0-dev.0 - user_ldap: 1.22.0 - weather_status: 1.11.0 (installed 1.11.0) ``` ---
**Author:** ![jtr](https://help.nextcloud.com/letter_avatar/jtr/32/6_22734026db12803ebb3e059622ac3534.png) [@jtr](https://help.nextcloud.com/u/jtr)\ **Post date:** [December 19, 2025, 5:25pm UTC](https://help.nextcloud.com/t/calendar-not-displaying-at-all/237599/2 "2025-12-19T17:25:10Z")
Does it basically impact any app you install (at least the ones that create icons; so not `richdocuments`)? Please post your Docker Compose file. ---
**Author:** ![Multipass](https://help.nextcloud.com/letter_avatar/multipass/32/6_22734026db12803ebb3e059622ac3534.png) [@Multipass](https://help.nextcloud.com/u/Multipass)\ **Post date:** [December 20, 2025, 4:18pm UTC](https://help.nextcloud.com/t/calendar-not-displaying-at-all/237599/3 "2025-12-20T16:18:34Z")
Well, thanks for asking for the docker compose file, the issue was there !! In the container, there is : `/var/www/html/apps` `/var/www/html/custom_apps` But I had bind mounted the custom\_apps in a different folder, so I had something like : `- /path/to/nextcloud/data/html:/var/www/html` `- /path/to/nextcloud/data/apps:/var/www/html/custom_apps` As soon as I moved the existing “custom\_apps” folder on my machine to /path/to/nextcloud/data/html and remove the mount for custom\_apps (+ fixing permissions and ownership), the calendar app worked !! Now I can move to Nextcloud office (issue with built in CODE server and Collabora access, but that’ll be for another post). Thanks !! ---
**Author:** ![system](https://help.nextcloud.com/user_avatar/help.nextcloud.com/system/32/29333_2.png) [@system](https://help.nextcloud.com/u/system)\ **Post date:** [December 28, 2025, 4:18pm UTC](https://help.nextcloud.com/t/calendar-not-displaying-at-all/237599/4 "2025-12-28T16:18:47Z")
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