Custom form throws ‘Cannot unset string offsets’ error

I’m trying to build a form for my custom entity and so far the form is looking pretty good. However, when I press the Save button I get this error: The website encountered an unexpected error. Please try again later. Error: Cannot unset string offsets in Drupal\Core\Field\WidgetBase->extractFormValues() (line 367 of core/lib/Drupal/Core/Field/WidgetBase.php). Drupal\Core\Field\WidgetBase->extractFormValues(Object, Array, Object) (Line:…

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Is there any reason to keep firewalld running on a virtual machine with host firewall?

I’m setting up a CentOS 8 virtual machine created under Proxmox. Even when I choose the minimal install, I’m getting firewalld installed and enabled by default. If I activate Proxmox’s built-in firewall, is there any reason why I should keep firewalld on the VM? Is there any scenario that could justify keeping the guest firewall…

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What is the best way to install Okular outside KDE: snap, flatpak or apt?

In Xfce, installing Okular with apt would bring 100 new dependencies in a 19 MB download, taking 101 MB on disk : The following NEW packages will be installed: kinit kio kpackagetool5 libaccounts-glib0 libaccounts-qt5-1 libdbusmenu-qt5-2 libfam0 libkaccounts1 libkf5activities5 libkf5archive5 libkf5attica5 libkf5auth-data libkf5auth5 libkf5bookmarks-data libkf5bookmarks5 libkf5codecs-data libkf5codecs5 libkf5completion-data libkf5completion5 libkf5config-data libkf5configcore5 libkf5configgui5 libkf5configwidgets-data libkf5configwidgets5 libkf5coreaddons-data libkf5coreaddons5…

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