Hugoで構築したサイトをAWS Amplifyへデプロイする際の注意点

[INFO]: # Updating Git submodules...
[WARNING]: # Unable to update submodules: Error: Command failed: git submodule update
           Cloning into '/codebuild/output/(略)/themes/stack'...
           Host key verification failed.
           fatal: Could not read from remote repository.
           Please make sure you have the correct access rights
           and the repository exists.
           fatal: clone of 'git@github.com:CaiJimmy/hugo-theme-stack.git' into submodule path '/codebuild/output/(略)/themes/stack' failed
           Failed to clone 'themes/stack'. Retry scheduled

git submodule add git@github.com:OWNER/REPO.git themes/XXX

git submodule add https://github.com/OWNER/REPO.git themes/XXX

# 一旦削除
git rm themes/XXX
git config --remove-section submodule.themes/XXX
rm -rf .git/modules/themes/XXX

# 再追加
git submodule add https://github.com/OWNER/REPO.git themes/XXX

[WARNING]: Error: Unable to locate config file or config directory. Perhaps you need to create a new site.

[INFO]: WARN  Module "stack" is not compatible with this Hugo version; run "hugo mod graph" for more information.
[INFO]: Start building sites …
[INFO]: hugo v0.121.2-6d5b44305eaa9d0a157946492a6f319da38de154 linux/amd64 BuildDate=2024-01-05T12:21:15Z VendorInfo=gohugoio
[INFO]: ERROR render of "page" failed: "/codebuild/output/(略)/themes/stack/layouts/_default/baseof.html:19:19": execute of template failed: template: _default/single.html:19:19: executing "left-sidebar" at <partial "sidebar/left.html" .>: error calling partial: "/codebuild/output/(略)/layouts/partials/sidebar/left.html:19:52": execute of template failed: template: partials/sidebar/left.html:19:52: executing "partials/sidebar/left.html" at <$avatar.Resize>: error calling Resize: image "/codebuild/output/(略)/assets/avatar.webp": this feature is not available in your current Hugo version, see https://goo.gl/YMrWcn for more information
[INFO]: ERROR TOCSS: failed to transform "scss/style.scss" (text/x-scss). Check your Hugo installation; you need the extended version to build SCSS/SASS with transpiler set to 'libsass'.: this feature is not available in your current Hugo version, see https://goo.gl/YMrWcn for more information
        Total in 758 ms
        Error: error building site: render: failed to render pages: render of "page" failed: "/codebuild/output/(略)/themes/stack/layouts/_default/baseof.html:19:19": execute of template failed: template: _default/single.html:19:19: executing "left-sidebar" at <partial "sidebar/left.html" .>: error calling partial: "/codebuild/output/(略)/layouts/partials/sidebar/left.html:19:52": execute of template failed: template: partials/sidebar/left.html:19:52: executing "partials/sidebar/left.html" at <$avatar.Resize>: error calling Resize: image "/codebuild/output/(略)/assets/avatar.webp": this feature is not available in your current Hugo version, see https://goo.gl/YMrWcn for more information
[ERROR]: !!! Build failed
[ERROR]: !!! Non-Zero Exit Code detected