template or render function not defined

[selfagency]

Getting the following with the barest of barebone test pages:

[Vue warn]: Failed to mount component: template or render function not defined.

found in

---> <Index>
       <Root>

But alas, it is.

[selfagency]

Ok, I got past that but now I get:

index.vue?vue&type=template:3 Uncaught TypeError: (0 , import_vue2.pushScopeId) is not a function
    at index.vue?vue&type=template:3
(anonymous) @ index.vue?vue&type=template:3

Also noticed that the Vue components aren't getting processed by the esbuild postcss plugin I have in there and that the un-postprocessed CSS is being prepended to the properly compiled CSS, before the global CSS rules.