Troubleshooting CalDAV Connections Both

Diagnostic checklist for troubleshooting CalDAV synchronization with Apple Reminders, DAVx⁵, Thunderbird, Fantastical, and Home Assistant.

1. "401 Unauthorized" or Invalid Password

• Use App Passwords: CalDAV clients must authenticate using an App Password generated in Settings → Developer → App Passwords.
• Verify Scopes: Ensure your App Password was issued with both tasks:read and tasks:write permissions.
• Account Email: In the CalDAV username field, always enter your full TapTidy account email address.

2. "Unable to Create Calendar" or MKCALENDAR Errors

• Single Collection Architecture: TapTidy hosts a single, unified tasks calendar collection per account. It intentionally rejects MKCALENDAR requests to create secondary remote calendars.
• Client Setup Prompt: If your client's initial setup wizard asks you to name or create a new calendar, cancel that prompt and select the existing discovered tasks collection.

3. Client-Specific Configuration Tips