FletでWindows向けビルドが失敗する

../../../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flet-0.25.2/lib/src/utils/theme.dart(356,28): error G44692867: A value of type 'TabBarThemeData' can't be returned from a function with return type     
'TabBarTheme?'. [C:MYPROJECT\build\flutter\build\windows\x64\flutter\flutter_assemble.vcxproj]
../../../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flet-0.25.2/lib/src/utils/theme.dart(438,28): error G44692867: A value of type 'DialogThemeData' can't be returned from a function with return type     
'DialogTheme?'. [C:MYPROJECT\build\flutter\build\windows\x64\flutter\flutter_assemble.vcxproj]
../../../../../../AppData/Local/Pub/Cache/hosted/pub.dev/flet-0.25.2/lib/src/utils/theme.dart(482,26): error G44692867: A value of type 'CardThemeData' can't be returned from a function with return type       
'CardTheme?'. [C:MYPROJECT\build\flutter\build\windows\x64\flutter\flutter_assemble.vcxproj]
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(254,5): error MSB8066:
'C:MYPROJECT\build\flutter\build\windows\x64\CMakeFiles\7709877bbcac1fac002d182c7d3db39e\flutter_windows.dll.rule;C:MYPROJECT\build
\flutter\build\windows\x64\CMakeFiles\7bf40fe8777649bc7ee9e5f4af6acc77\flutter_assemble.rule' のカスタム ビルドがコード 1 で終了しました。
[C:MYPROJECT\build\flutter\build\windows\x64\flutter\flutter_assemble.vcxproj]
Build process failed.

# 25/1/28時点
$ pip index versions flet
WARNING: pip index is currently an experimental command. It may be removed/changed in a future release without prior warning.
flet (0.26.0)
Available versions: 0.26.0, 0.25.2, 0.25.1, 0.25.0, 0.24.1, 0.24.0, 0.23.2, 0.23.1, 0.23.0, 0.22.1, 0.22.0, 0.21.2, 0.19.0, 0.18.0, 0.17.0, 0.16.0, 0.15.0, 0.14.0, 0.13.0, 0.12.2, 0.12.1, 0.12.0, 0.11.0, 0.10.3, 0.10.2, 0.10.1, 0.10.0, 0.9.0, 0.1.65, 0.1.64, 0.1.63, 0.1.62, 0.1.61, 0.1.60, 0.1.59, 0.1.58, 0.1.57, 0.1.56, 0.1.0
  INSTALLED: 0.25.2
  LATEST:    0.26.0

$ pip list | grep flet
flet                  0.25.2
flet-cli              0.25.2
flet-desktop          0.25.2
flet-web              0.25.2

# requirement.txt
flet >= 0.26.0
flet-cli >= 0.26.0
flet-desktop >= 0.26.0
flet-web >= 0.26.0

pip install -r requirement.txt

$ flet build windows
[20:45:58] Created Flutter bootstrap project from gh:flet-dev/flet-build-template with ref "0.26.0" ✅
[20:47:10] Packaged Python app ✅
[20:47:12] Customized app icons and splash images ✅
[20:47:20] Generated app icons ✅
[20:49:18] Built Windows app ✅
[20:49:19] Copied build to build\windows directory ✅
╭──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ Successfully built your Windows app! 🥳 Find it in build\windows directory. 📁