After the workaround, KDE Partition Manager sees the encrypted partition as lvm2 rather than luks, and says lvm2 needs to be installed. After installing lvm2, KDE Partition Manager sees the drives correctly. Dolphin still gives error:
An error occurred while accessing '58.9 GiB Encrypted Drive', the system responded: An unspecified error has occurred: No such interface 'org.freedesktop.UDisks2.Filesystem' on object at path /org/freedesktop/UDisks2/block_devices/dm_2d0
After the workaround, KDE Partition Manager sees the encrypted partition as lvm2 rather than luks, and says lvm2 needs to be installed. After installing lvm2, KDE Partition Manager sees the drives correctly. Dolphin still gives error: p.UDisks2. Filesystem' on object at path /org/freedeskto p/UDisks2/ block_devices/ dm_2d0
An error occurred while accessing '58.9 GiB Encrypted Drive', the system responded: An unspecified error has occurred: No such interface 'org.freedeskto