Reparse commit processing fails on PHP 7.3

When i found that the commit and looks like this : Still Importing…

This commit is still importing. Changes will be visible once the import finishes.

So i use ./bin/repository reparse R32:c9dde77401ca90d386708dfe8917dba33a0cbc19 --message --change --herald --owners --force
but

root@ubuntu:/home/pha/phabricator/phabricator# ./bin/repository reparse  R32:c9dde77401ca90d386708dfe8917dba33a0cbc19  --message --change --herald --owners --force
[2019-06-28 11:25:49] EXCEPTION: (Exception) Error while loading file "/home/pha/phabricator/phabricator/src/applications/maniphest/editor/ManiphestTransactionEditor.php": "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? at [<phutil>/src/moduleutils/PhutilBootloader.php:277]
arcanist(head=master, ref.master=2650e8627a20), phabricator(head=master, ref.master=8065433ee8dc, custom=2), phutil(head=master, ref.master=3215e4e291ed)
  #0 PhutilBootloader::executeInclude(string) called at [<phutil>/src/moduleutils/PhutilBootloader.php:213]
  #1 PhutilBootloader::loadLibrarySource(string, string) called at [<phutil>/src/symbols/PhutilSymbolLoader.php:381]
  #2 PhutilSymbolLoader::loadSymbol(array) called at [<phutil>/src/symbols/PhutilSymbolLoader.php:256]
  #3 PhutilSymbolLoader::selectAndLoadSymbols() called at [<phutil>/src/__phutil_library_init__.php:22]
  #4 __phutil_autoload(string)
  #5 spl_autoload_call(string) called at [<phabricator>/src/applications/maniphest/storage/ManiphestTask.php:452]
  #6 ManiphestTask::getApplicationTransactionEditor() called at [<phabricator>/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php:3715]
  #7 PhabricatorApplicationTransactionEditor::applyInverseEdgeTransactions(PhabricatorRepositoryCommit, PhabricatorAuditTransaction, integer) called at [<phabricator>/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php:770]
  #8 PhabricatorApplicationTransactionEditor::applyBuiltinExternalTransaction(PhabricatorRepositoryCommit, PhabricatorAuditTransaction) called at [<phabricator>/src/applications/audit/editor/PhabricatorAuditEditor.php:156]
  #9 PhabricatorAuditEditor::applyBuiltinExternalTransaction(PhabricatorRepositoryCommit, PhabricatorAuditTransaction) called at [<phabricator>/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php:684]
  #10 PhabricatorApplicationTransactionEditor::applyExternalEffects(PhabricatorRepositoryCommit, PhabricatorAuditTransaction) called at [<phabricator>/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php:1095]
  #11 PhabricatorApplicationTransactionEditor::applyTransactions(PhabricatorRepositoryCommit, array) called at [<phabricator>/src/applications/repository/worker/PhabricatorRepositoryCommitHeraldWorker.php:80]
  #12 PhabricatorRepositoryCommitHeraldWorker::parseCommit(PhabricatorRepository, PhabricatorRepositoryCommit) called at [<phabricator>/src/applications/repository/worker/PhabricatorRepositoryCommitParserWorker.php:51]
  #13 PhabricatorRepositoryCommitParserWorker::doWork() called at [<phabricator>/src/infrastructure/daemon/workers/PhabricatorWorker.php:123]
  #14 PhabricatorWorker::executeTask() called at [<phabricator>/src/applications/repository/management/PhabricatorRepositoryManagementReparseWorkflow.php:325]
  #15 PhabricatorRepositoryManagementReparseWorkflow::execute(PhutilArgumentParser) called at [<phutil>/src/parser/argument/PhutilArgumentParser.php:457]
  #16 PhutilArgumentParser::parseWorkflowsFull(array) called at [<phutil>/src/parser/argument/PhutilArgumentParser.php:349]
  #17 PhutilArgumentParser::parseWorkflows(array) called at [<phabricator>/scripts/repository/manage_repositories.php:22]
root@ubuntu:/home/pha/phabricator/phabricator# 

Can u give me some help?thanks.

Your install is almost a year out of date. You should update.