Failed opening .../critical.css

[pirco]

using the theme generator at https://wdunderscores.com/ I get this warning:

Warning:  include(/public_html/wp-content/themes/sprim/build/critical.css): failed to open stream: No such file or directory in /public_html/wp-content/themes/sprim/inc/setup/critical-css.php on line 18

Warning:  include(): Failed opening '/public_html/wp-content/themes/sprim/build/critical.css' for inclusion (include_path='.:/usr/local/php74/pear') in /public_html/wp-content/themes/sprim/inc/setup/critical-css.php on line 18

also, there's no zip found at http://wdunderscores.com/wp-content/themes/wdunderscores/inc/prototype/wd_s.zip (under Quickstart in readme)

[SamuelAshbrook]

I also have this problem. Is there a fix for this?