Could not execute command 'sassc'

win10 安裝odoo12報錯：
“Could not execute command 'sassc'This error occured while compiling the bundle 'web.assets_common' containing:”
問題日志報錯：
Style error
The style compilation failed, see the error below. Your recent actions may be the cause, please try reverting the changes you made.
Could not execute command 'sassc'This error occured while compiling the bundle 'web.assets_common' containing:

• /web/static/lib/bootstrap/scss/bootstrap/_mixins.scss
• /web/static/src/scss/utils.scss
• /web/static/src/scss/primary_variables.scss
• /web_editor/static/src/scss/web_editor.variables.scss
• /web/static/src/scss/secondary_variables.scss
• /web/static/lib/bootstrap/scss/bootstrap/_variables.scss
• /web/static/lib/bootstrap-datetimepicker/src/scss/_bootstrap-datetimepicker.scss
• /web/static/src/scss/fonts.scss
• /web/static/src/scss/ui.scss
• /web/static/src/scss/ui_extra.scss
• /web/static/src/scss/navbar.scss
• /web/static/src/scss/mimetypes.scss
• /web/static/src/scss/modal.scss
• /web/static/src/scss/animation.scss
• /web/static/src/scss/rainbow.scss
• /web/static/src/scss/datepicker.scss
• /web_tour/static/src/scss/tip.scss
• /web_tour/static/src/scss/keyframes.scss

解決方法： 給odoo應用安裝sassc的依賴庫，命令:pip install libsass

結果：