Address Book HTTP 500 Error

Describe the bug

On my family's Nextcloud server, we have a large address book shared between everyone in the household. Recently, it sort of disappeared. It still shows up in Evolution but fails to sync with this error:

Failed to get properties: HTTP error code 500 (Internal Server Error)

When I try to pull it up directly in Nextcloud, it doesn't show up at all under Contacts. Since Evolution is still getting some feedback, I assume the address book is still there but it's having troubles processing something in the address book.

Steps to reproduce

1. Go to Contacts
2. The contacts in the address book are missing.
3. Click "Contacts settings"
4. The address book isn't listed

Expected behavior

Address Book to show in Contacts and sync to Evolution.

Actual behavior

Address Book and its entries do not show up in Contacts or sync to Evolution

Contact version

5.5.2

Operating system

Linux 6.1.0-18-arm64 aarch64 (Debian Bookworm)

PHP engine version

Other

Web server

Apache (supported)

Database

PostgreSQL

Additional info

PHP: 8.2.7

My nextcloud.log is spammed with this message, I'm not sure if it's relevant:

{"reqId":"OaEnfdCWFe0gCnoCGq2E","level":1,"time":"February 23, 2024 22:18:30","remoteAddr":"Removed","user":"--","app":"no app in context","method":"REPORT","url":"/remote.php/caldav/calendars/Removed/Removed/","message":"Unable to generate a URL for the named route "polls.page.index" as such route does not exist.","userAgent":"Evolution/3.44.4","version":"28.0.1.1","exception":{"Exception":"Symfony\Component\Routing\Exception\RouteNotFoundException","Message":"Unable to generate a URL for the named route "polls.page.index" as such route does not exist.","Code":0,"Trace":[{"file":"/mnt/Removed/nextcloud/site/lib/private/Route/Router.php","line":380,"function":"generate","class":"Symfony\Component\Routing\Generator\UrlGenerator","type":"->"},{"file":"/mnt/Removed/nextcloud/site/lib/private/Route/CachingRouter.php","line":65,"function":"generate","class":"OC\Route\Router","type":"->"},{"file":"/mnt/Removed/nextcloud/site/lib/private/URLGenerator.php","line":103,"function":"generate","class":"OC\Route\CachingRouter","type":"->"},{"file":"/mnt/Removed/nextcloud/site/lib/private/NavigationManager.php","line":374,"function":"linkToRoute","class":"OC\URLGenerator","type":"->"},{"file":"/mnt/Removed/nextcloud/site/lib/private/NavigationManager.php","line":131,"function":"init","class":"OC\NavigationManager","type":"->"},{"file":"/mnt/Removed/nextcloud/site/apps/theming/lib/ThemingDefaults.php","line":199,"function":"getAll","class":"OC\NavigationManager","type":"->"},{"file":"/mnt/Removed/nextcloud/site/lib/private/legacy/OC_Defaults.php","line":271,"function":"getShortFooter","class":"OCA\Theming\ThemingDefaults","type":"->"},{"file":"/mnt/Removed/nextcloud/site/lib/public/Defaults.php","line":176,"function":"getLongFooter","class":"OC_Defaults","type":"->"},{"file":"/mnt/Removed/nextcloud/site/core/templates/layout.guest.php","line":51,"function":"getLongFooter","class":"OCP\Defaults","type":"->"},{"file":"/mnt/Removed/nextcloud/site/lib/private/Template/Base.php","line":180,"args":["/mnt/Removed/nextcloud/site/core/templates/layout.guest.php"],"function":"include"},{"file":"/mnt/Removed/nextcloud/site/lib/private/Template/Base.php","line":150,"function":"load","class":"OC\Template\Base","type":"->"},{"file":"/mnt/Removed/nextcloud/site/lib/private/legacy/OC_Template.php","line":139,"function":"fetchPage","class":"OC\Template\Base","type":"->"},{"file":"/mnt/Removed/nextcloud/site/lib/private/legacy/OC_Template.php","line":170,"function":"fetchPage","class":"OC_Template","type":"->"},{"file":"/mnt/Removed/nextcloud/site/lib/private/Template/Base.php","line":132,"function":"fetchPage","class":"OC_Template","type":"->"},{"file":"/mnt/Removed/nextcloud/site/lib/private/legacy/OC_Template.php","line":258,"function":"printPage","class":"OC\Template\Base","type":"->"},{"file":"/mnt/Removed/nextcloud/site/remote.php","line":85,"function":"printErrorPage","class":"OC_Template","type":"::"},{"file":"/mnt/Removed/nextcloud/site/remote.php","line":174,"function":"handleException"}],"File":"/mnt/Removed/nextcloud/site/3rdparty/symfony/routing/Generator/UrlGenerator.php","Line":144,"message":"Unable to generate a URL for the named route "polls.page.index" as such route does not exist.","exception":{},"CustomMessage":"Unable to generate a URL for the named route "polls.page.index" as such route does not exist."}}

Start by reproducing the missing address book in Contacts and the Evolution REPORT request, then compare the failure with the trace through lib/private/Route/Router.php, lib/private/NavigationManager.php, and remote.php. The issue is resolved when the address book appears under Contacts and synchronizes without an HTTP 500 error.