It looks like there have been some changes to the folder structure of CoreUI since you created the build-aspnetcore scripts. Some of the html file have been moved to subfolders like src\buttons\dropdowns.html, and are not getting updated or converted to cshtml. To fix this issue you need to update line 32 of build\aspnetcore-lib.js to the following.
It looks like there have been some changes to the folder structure of CoreUI since you created the build-aspnetcore scripts. Some of the html file have been moved to subfolders like src\buttons\dropdowns.html, and are not getting updated or converted to cshtml. To fix this issue you need to update line 32 of build\aspnetcore-lib.js to the following.
fs.readdirSync(dir).filter(f => fileExt === '*' ? true : (path.extname(f) === fileExt || path.extname(f) === "")).forEach(file => {