First use: "couldn't find package.json" right after installation

I freshly installed the ESPHome addon through the home assistant addon store ui.
Right after the successful installation, I tried to add my D1 Mini through the browser UI. Unfortunately, the initialization of my device failed (while trying to compile the initial setup) with the following error:

MissingPackageManifestError: Could not find one of 'package.json' manifest files in the package

I didn’t touch anything codewise. Therefore, my yaml is still the standard one.
I already tried to re-install the addon.

Any idea how to solve this?

(My Home Assistant Operating System runs on a Raspberry Pi 3+, if that matters)

Hopefully a temporary glitch with platformio. Clean the directory and try again.