Error Generating CSS - Unknown word Usage: critical

[vinaykumar9999]

Hi

I am generating critical CSS via following command line

bin/magento m2bp:critical-css:generate -vvv

But getting these two errors.

Output: ================ Error Output: ================ Error: Error: No stylesheets found in document and no css was specified in the options

Exit Code: 1(General error) Working directory: /home/test/vkn Output: ================ Error Output: ================ Error: /produc-black.css:1:1: Unknown word Usage: critical

Pleas help in this issue.