Specifically, please see the ‘height/width attributes should be in pixels’ NOTEs in the Rd files check.

These are from using the \figure{FILENAME}{options: STRING} expert form in Rd files with options specifying height or width attributes not in pixels, typically in percentages. The HTML5 standard mandates that these are in pixels: to use percentages or other units, please use CSS style attributes instead. E.g., change

\figure{FILENAME}{options: width=“25%“}

to

\figure{FILENAME}{options: style=“width: 25%;“}

which should take only very little time.

Please correct before 2025-12-15 to safely retain your package on CRAN.

The musl check failure on the package check page is addressed already.