Created attachment 155479 [details]
Screenshot of manfunctioning configuration form

SUMMARY
Cannot add Online accounts to KDE-Kalendar - Respective configuration form does not open

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STEPS TO REPRODUCE
1. Install Kalendar on KDE Neon
2. Start Kalendar
3. Click Settings > Configure Kalendar

OBSERVED RESULT
Configuration forms for "Accounts" and "Calendars" do not render (see attached screenshot). No accounts can be added, which is making the application practically unusable for many (most?) use cases
(Note: Forms for "Appearance" and "About Kalendar" do render correctly)
Console throws: 
kf.kirigami: (qrc:/SourceSettingsPage.qml:16:9: Type AgentConfigurationForm unavailable
            AgentConfigurationForm {
            ^, file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/akonadi/AgentConfigurationForm.qml:9:1: module "org.kde.kirigamiaddons.labs.mobileform" is not installed
    import org.kde.kirigamiaddons.labs.mobileform 0.1 as MobileForm
    ^)


EXPECTED RESULT
Configurations forms for "Accounts" and "Calendars" should render

SOFTWARE/OS VERSIONS
Operating System: KDE neon 5.26
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Kernel Version: 5.15.0-58-generic (64-bit)
Graphics Platform: X11
Processors: 8 × AMD Ryzen 5 2500U with Radeon Vega Mobile Gfx
Memory: 6,7 GiB of RAM
Graphics Processor: AMD Radeon Vega 8 Graphics
Manufacturer: HUAWEI
Product Name: KPL-W0X
System Version: M1D

ADDITIONAL INFORMATION
Appears to be a packaging issue with kirigamiaddons. But the package is from KDE Neon-Repos