Across all environments, there were no ERRORs or WARNINGs, but some NOTEs.
The NOTEs were the following:
Two NOTEs mentioning left-over files:
* checking for detritus in the temp directory ... NOTE
Found the following files/directories:
'lastMiKTeXException'
* checking for non-standard things in the check directory ... NOTE
Found the following files/directories:
''NULL''
One NOTE about a possibly invalid URL. This NOTE is a false positive, the URL is valid and online when opened in a browser:
Found the following (possibly) invalid URLs:
URL: https://support.posit.co/hc/en-us/articles/200486498-Package-Development-Prerequisites
From: README.md
Status: 403
Message: Forbidden
One NOTE about a missing tidy command:
* checking HTML version of manual ... NOTE
Skipping checking HTML validation: no command 'tidy' found
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