buildbot failure in on ofbizBranch18Framework

[buildbot]

The Buildbot has detected a new failure on builder ofbizBranch18Framework while building . Full details are available at:
    https://ci.apache.org/builders/ofbizBranch18Framework/builds/5

Buildbot URL: https://ci.apache.org/

Buildslave for this Build: silvanus_ubuntu

Build Reason: The AnyBranchScheduler scheduler named 'onBranch18FrameworkCommit' triggered this build
Build Source Stamp: [branch ofbiz/ofbiz-framework/branches/release18.12] 1850695
Blamelist: jleroux

BUILD FAILED: failed shell_2

Sincerely,
 -The Buildbot