WPT update job is broken

[jdm]

+ ./etc/ci/update-wpt-checkout fetch-and-update-expectations
+ cat
Switched to a new branch 'wpt_update'
./etc/ci/update-wpt-checkout: line 52: python3: command not found
fatal: No such remote: sync-fork
HEAD is now at a757066476 Update web-platform-tests to revision 9f70d312fbc402835eb614e6baa5835e55f8c8f6
Switched to branch 'master'
Deleted branch wpt_update (was a757066476).
+ ./etc/ci/update-wpt-checkout open-pr
error: pathspec 'wpt_update' did not match any file(s) known to git.
+ ./etc/ci/update-wpt-checkout cleanup
fatal: No such remote: sync-fork
HEAD is now at 250184fe60 Auto merge of #25117 - servo:wptupdate-linux, r=jdm
Already on 'master'
error: branch 'wpt_update' not found.