TypeError: Lookups.flatmap - это не функция
npm list -g --depth=0
Distinct Dormouse
npm list -g --depth=0
npm install -g gulp@3.9.1
npm install -g yo@3.1.0
+-- @microsoft/generator-sharepoint@1.11.0
+-- gulp@4.0.2
+-- npm@6.14.12
+-- windows-build-tools@5.2.2
-- yo@4.0.0
gulp serve
npm uninstall -g gulp
npm uninstall -g yo
yo @microsoft/sharepoint