buildbot exception in MacPorts on ports-11.0_arm64-watcher

[buildbot at macports.org]

The Buildbot has detected a build exception on builder ports-11.0_arm64-watcher while building macports/macports-ports. Full details are available at:
    https://build.macports.org/builders/ports-11.0_arm64-watcher/builds/11

Buildbot URL: https://build.macports.org/

Buildslave for this Build: ports-11.0_arm64

Build Reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Build Source Stamp: [branch master] cf3b386d12fe20d0e0b07847508f9219f5e7baba
Blamelist: Andrey Stromnov <stromnov at macports.org>

BUILD FAILED: exception

Sincerely,
 -The Buildbot