EXCEPTION (PhutilMissingSymbolException): Failed to load class or interface "PhabricatorMailImplementationAdapter". The class or interface "PhabricatorMailImplementationAdapter" is not defined in the library map of any loaded library. If you are not a developer, this almost always means that a library is out of date. For example, you may have upgraded "phabricator/" without upgrading "libphutil/", or vice versa. It might also mean that you need to restart Apache or PHP-FPM. Make sure all libraries are up to date and all services have been restarted. If you are a developer and this symbol was recently added or moved, your library map may need to be rebuilt. You can rebuild the map by running "arc liberate". For more information, see: https://phurl.io/newclasses #0 [internal function]: __phutil_autoload('PhabricatorMail...') #1 /srv/phab/phabricator/src/applications/metamta/adapter/PhabricatorMailImplementationPHPMailerAdapter.php(4): spl_autoload_call('PhabricatorMail...') #2 /srv/phab/libphutil/src/moduleutils/PhutilBootloader.php(258): include_once('/srv/phab/phabr...') #3 /srv/phab/libphutil/src/moduleutils/PhutilBootloader.php(222): PhutilBootloader->executeInclude('/srv/phab/phabr...') #4 /srv/phab/libphutil/src/symbols/PhutilSymbolLoader.php(381): PhutilBootloader->loadLibrarySource('phabricator', 'applications/me...') #5 /srv/phab/libphutil/src/symbols/PhutilSymbolLoader.php(256): PhutilSymbolLoader->loadSymbol(Array) #6 /srv/phab/libphutil/src/__phutil_library_init__.php(22): PhutilSymbolLoader->selectAndLoadSymbols() #7 [internal function]: __phutil_autoload('PhabricatorMail...') #8 [internal function]: spl_autoload_call('PhabricatorMail...') #9 /srv/phab/libphutil/src/__tests__/PhutilLibraryTestCase.php(102): ReflectionClass->__construct('PhabricatorMail...') #10 /srv/phab/arcanist/src/unit/engine/phutil/PhutilTestCase.php(492): PhutilLibraryTestCase->testMethodVisibility() #11 /srv/phab/arcanist/src/unit/engine/PhutilUnitTestEngine.php(69): PhutilTestCase->run() #12 /srv/phab/arcanist/src/unit/engine/ArcanistConfigurationDrivenUnitTestEngine.php(148): PhutilUnitTestEngine->run() #13 /srv/phab/arcanist/src/workflow/ArcanistUnitWorkflow.php(170): ArcanistConfigurationDrivenUnitTestEngine->run() #14 /srv/phab/arcanist/src/workflow/ArcanistDiffWorkflow.php(1324): ArcanistUnitWorkflow->run() #15 /srv/phab/arcanist/src/workflow/ArcanistDiffWorkflow.php(1212): ArcanistDiffWorkflow->runUnit() #16 /srv/phab/arcanist/src/workflow/ArcanistDiffWorkflow.php(483): ArcanistDiffWorkflow->runLintUnit() #17 /srv/phab/arcanist/scripts/arcanist.php(394): ArcanistDiffWorkflow->run() #18 {main}