I have recently updated to javacpp and java cv to 1.5.9 it start giving me error.

java.lang.module.FindException: Module org.bytedeco.flandmark not found, required by org.bytedeco.javacv
I don't need the flandmark, still add it, another issue.

flandmark is not available with 1.5.9 but available with 1.5.8, i think updated needed on the version no. i find it by investigating the pom. another confusing it shows a different version no in the readme file, then inside the pom file, check the screenshot.

manage to resolve issue by adding

org.bytedeco
flandmark
1.07-1.5.8