Steps to reproduce
Summary
A single task containing an invalid monthly recurrence rule causes its entire task list to disappear from the Nextcloud Tasks sidebar. No visible error notification explains what happened.
Possible steps to reproduce
- Edit a recurring task in Nextcloud Tasks.
- Set a monthly recurrence and select both the 24th and 25th.
- Deselect one of these days and save.
- Reload Tasks.
This editing sequence preceded the problem, but I have not independently reproduced the creation of the malformed rule.
Actual behaviour
The affected list briefly appears and then disappears. Its tasks are also absent from “All”. The same behaviour occurs in a private Firefox window.
The browser console reports:
Error: Could not extract integer from ""
The stack trace includes ical.js and getTasksFromCalendar in calendars.js.
Evidence
The Nextcloud ICS export contains this rule in one task:
RRULE:FREQ=MONTHLY;BYMONTHDAY=,24;UNTIL=20261225T020000Z
Parsing the export with ical.js reproduces the exact error. Removing only the empty entry before 24 allows the entire export to parse successfully.
Recovery
I removed recurrence and reminders from the affected task in Thunderbird and saved it back to the server. After reloading Nextcloud Tasks, the entire list became visible again.
Expected behaviour
- Editing recurrence must not produce empty BYMONTHDAY entries.
- One malformed task should not prevent the rest of the list from loading.
- The app should identify the affected task and display an actionable error.
Environment
Nextcloud version: Managed Nextcloud by hosting.de 32.0.12
Tasks version: 0.18.0
Browser: Firefox on macOS
Connected clients: Thunderbird and NowThis
NowThis was closed on all devices during troubleshooting.
The client that originally wrote the malformed rule has not been conclusively identified.
Expected behavior
A malformed recurrence rule in one task should not hide the entire task list. Other tasks should remain accessible, and an error message should identify the affected task.
Actual behaviour
The entire task list briefly appears and then disappears. The console reports: Could not extract integer from ""
One task contained BYMONTHDAY=,24. Removing recurrence from that task in Thunderbird and saving it back to the server made the list visible again.
Tasks app version
0.18.0
CalDAV-clients used
Thundergird
Browser
Firefox 155.0.1
Client operating system
macOS
Server operating system
Unknown – managed by hosting.de
Web server
No response
Database engine version
No response
PHP engine version
No response
Nextcloud version
32.0.12
Updated from an older installed version or fresh install
No response
List of activated apps
Nextcloud configuration
Web server error log
Log file
Browser log
Error: Could not extract integer from ""
Additional info
Managed Nextcloud hosted by hosting.de. Server OS, web server, database, PHP version and upgrade history are unknown to me. “None” in these fields means unknown.
Steps to reproduce
Summary
A single task containing an invalid monthly recurrence rule causes its entire task list to disappear from the Nextcloud Tasks sidebar. No visible error notification explains what happened.
Possible steps to reproduce
This editing sequence preceded the problem, but I have not independently reproduced the creation of the malformed rule.
Actual behaviour
The affected list briefly appears and then disappears. Its tasks are also absent from “All”. The same behaviour occurs in a private Firefox window.
The browser console reports:
Error: Could not extract integer from ""
The stack trace includes ical.js and getTasksFromCalendar in calendars.js.
Evidence
The Nextcloud ICS export contains this rule in one task:
RRULE:FREQ=MONTHLY;BYMONTHDAY=,24;UNTIL=20261225T020000Z
Parsing the export with ical.js reproduces the exact error. Removing only the empty entry before 24 allows the entire export to parse successfully.
Recovery
I removed recurrence and reminders from the affected task in Thunderbird and saved it back to the server. After reloading Nextcloud Tasks, the entire list became visible again.
Expected behaviour
Environment
Nextcloud version: Managed Nextcloud by hosting.de 32.0.12
Tasks version: 0.18.0
Browser: Firefox on macOS
Connected clients: Thunderbird and NowThis
NowThis was closed on all devices during troubleshooting.
The client that originally wrote the malformed rule has not been conclusively identified.
Expected behavior
A malformed recurrence rule in one task should not hide the entire task list. Other tasks should remain accessible, and an error message should identify the affected task.
Actual behaviour
The entire task list briefly appears and then disappears. The console reports: Could not extract integer from ""
One task contained BYMONTHDAY=,24. Removing recurrence from that task in Thunderbird and saving it back to the server made the list visible again.
Tasks app version
0.18.0
CalDAV-clients used
Thundergird
Browser
Firefox 155.0.1
Client operating system
macOS
Server operating system
Unknown – managed by hosting.de
Web server
No response
Database engine version
No response
PHP engine version
No response
Nextcloud version
32.0.12
Updated from an older installed version or fresh install
No response
List of activated apps
Nextcloud configuration
Web server error log
Log file
Browser log
Additional info
Managed Nextcloud hosted by hosting.de. Server OS, web server, database, PHP version and upgrade history are unknown to me. “None” in these fields means unknown.