Error calling ExecuteAsTemplate: type <nil> not supported in Resource transformations

[pamubay]

error calling partial: “/home/drm/WEBSITE/themes/hugo-book/layouts/partials/docs/html-head.html:19:58”

Line 19:

@Tom_Durand

{{- $manifest := resources.Get "manifest.json" | resources.ExecuteAsTemplate "manifest.json" . }}
<link rel="manifest" href="{{ $manifest.RelPermalink }}">

Hugo throws ERROR because the resource is <nil>, make sure manifest.json exists.