Check if there is no nexus running. If not, delete sonatype-work/nexus/nexus.lock .
You have a different solution? A short tip here would help you and many other users who saw this issue last week.
- java.lang.IllegalStateException: The path to the driver executable must be set by the webdriver.gecko.driver system property; for more information, see https://github.com/mozilla/geckodriver. The latest version can be downloaded from https://github.com/mozilla/geckodriver/releases at com.google.common.base.Preconditions.checkState(Preconditions.java:199)