[QUESTION] - Build problem

[akki55]

Description

I am following the installation instriuctions, however on the Build part I am getting BUILD FAILD notification
Dependencies: Gradle 6.9.3., Maven 3.6.0, Java 11

./gradlew build
mvn verify

Additional Context

command is run from the terminal at omv cloned directory

Relevant screenshots

ankica@ankica-Precision-5750:~/Tools/OML2.0.0923/oml$ ./gradlew build

Task :io.opencaesar.oml:javadoc FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':io.opencaesar.oml:javadoc'.

Javadoc generation failed. Generated Javadoc options file (useful for troubleshooting): '/home/ankica/Tools/OML2.0.0923/oml/io.opencaesar.oml/build/tmp/javadoc/javadoc.options'

• Try:

Run with --stacktrace option to get the stack trace.
Run with --info or --debug option to get more log output.
Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 1s
4 actionable tasks: 1 executed, 3 up-to-date