buildbot exception in on ofbizBranch17Framework

[buildbot]

The Buildbot has detected a build exception on builder ofbizBranch17Framework while building . Full details are available at:
    https://ci.apache.org/builders/ofbizBranch17Framework/builds/226

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

Buildslave for this Build: silvanus_ubuntu

Build Reason: The AnyBranchScheduler scheduler named 'onBranch17FrameworkCommit' triggered this build
Build Source Stamp: [branch ofbiz/ofbiz-framework/branches/release17.12] 1856457
Blamelist: jleroux

BUILD FAILED: exception shell_1 upload

Sincerely,
 -The Buildbot