Created attachment 175135 [details] Kmail crash SUMMARY The Kmail is crashed when the user delete the Local folder in the side bar. The cannot recover from the error even reinstalling Kmail. When running the crashed Kmail, the error message is as this: ``` Comparators already registered for type MetaEnumVariable org.kde.pim.akonadicore: Failed SpecialCollectionsRequestJob::slotResult "Failed to fetch the resource collection." org.kde.pim.mailcommon: "The Email program encountered a fatal error and will terminate now.\nThe error was:\nFailed to fetch the resource collection." org.kde.pim.akonadicore: Failed SpecialCollectionsRequestJob::slotResult "Failed to fetch the resource collection." org.kde.pim.mailcommon: "The Email program encountered a fatal error and will terminate now.\nThe error was:\nFailed to fetch the resource collection." org.kde.pim.akonadicore: Failed to request resource "akonadi_maildir_resource_0" : "Failed to fetch the resource collection." org.kde.pim.akonadicore: Failed SpecialCollectionsRequestJob::slotResult "Failed to fetch the resource collection." org.kde.pim.mailcommon: "The Email program encountered a fatal error and will terminate now.\nThe error was:\nFailed to fetch the resource collection." org.kde.pim.akonadicore: Failed to request resource "akonadi_maildir_resource_0" : "Failed to fetch the resource collection." org.kde.pim.akonadicore: Failed SpecialCollectionsRequestJob::slotResult "Failed to fetch the resource collection." org.kde.pim.mailcommon: "The Email program encountered a fatal error and will terminate now.\nThe error was:\nFailed to fetch the resource collection." org.kde.pim.akonadicore: Failed to request resource "akonadi_maildir_resource_0" : "Failed to fetch the resource collection." org.kde.pim.akonadicore: Failed SpecialCollectionsRequestJob::slotResult "Failed to fetch the resource collection." org.kde.pim.mailcommon: "The Email program encountered a fatal error and will terminate now.\nThe error was:\nFailed to fetch the resource collection." org.kde.pim.akonadicore: Failed to request resource "akonadi_maildir_resource_0" : "Failed to fetch the resource collection." org.kde.pim.akonadicore: Failed SpecialCollectionsRequestJob::slotResult "Failed to fetch the resource collection." org.kde.pim.mailcommon: "The Email program encountered a fatal error and will terminate now.\nThe error was:\nFailed to fetch the resource collection." org.kde.pim.akonadicore: Failed to request resource "akonadi_maildir_resource_0" : "Failed to fetch the resource collection. ``` STEPS TO REPRODUCE 1. Open Kmail 2. Delete the Local folder in the side bar OBSERVED RESULT The kmail crashed and shut down. Restart Kmail is not able to recover from the error. EXPECTED RESULT Should work even after delete the Local folder. Also, Kmail should handle the error, or even not allow the user to delete that folder. SOFTWARE/OS VERSIONS Linux/KDE Plasma: 6.8.0-47-generic / 5.27.1 KDE Plasma Version: 5.27.1 KDE Frameworks Version: Not sure Qt Version: Not sure ADDITIONAL INFORMATION