installer crashed on keyboard selection, IndexError: list index out of range

[t12122]

Traceback (most recent call last):
  File "/usr/lib/ubiquity/ubiquity/frontend/kde_components/Keyboard.py", line 175, in paintEvent
    x, rw = drawRow(keys[i], x, y, i == 1 and not ext_return)
  File "/usr/lib/ubiquity/ubiquity/frontend/kde_components/Keyboard.py", line 137, in drawRow
    rect, Qt.AlignLeft | Qt.AlignBottom, self.regular_text(k))
  File "/usr/lib/ubiquity/ubiquity/frontend/kde_components/Keyboard.py", line 222, in regular_text
    return self.codes[index - 1][0]
IndexError: list index out of range

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: ubiquity 21.04.19
ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
Uname: Linux 5.11.0-16-generic x86_64
ApportVersion: 2.20.11-0ubuntu65
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.461
CurrentDesktop: KDE
Date: Tue Nov 23 16:18:32 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/kubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Kubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
RebootRequiredPkgs:
 linux-image-5.11.0-16-generic
 linux-image-5.11.0-40-generic
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)