At least one ＜template＞ or ＜script＞ is required in a single file component.

This grammatical error is reported when a new vue3 project is introduced into the route. Check the version and there is nothing wrong with the wording. The literal meaning is that the template cannot be parsed.

I downloaded a template interpreter without thinking about it npm i vue-template-compiler

but nothing happened

After struggling for a while, I remembered that I introduced a routing file (vue file) because the newly created file has not written the html part, which is an empty file.

So just add this template structure