I discovered today the homepage fatals for me locally, because I didn't have PageViewInfo installed. https://www.mediawiki.org/wiki/Extension:GrowthExperiments and @kostajh both say PageViewInfo is a soft dependency, and thus, it shouldn't be required.
Traceback
[bde4cd381988eb10de4f461e] /mw/index.php?title=Special:Homepage&source=personaltoolslink&namespace=0 TypeError from line 56 of /mnt/c/Users/urban/unsynced/gerrit/mediawiki/extensions/GrowthExperiments/includes/Specials/SpecialHomepage.php: Argument 2 passed to GrowthExperiments\Specials\SpecialHomepage::__construct() must be an instance of MediaWiki\Extensions\PageViewInfo\PageViewService or null, instance of GrowthExperiments\NewcomerTasks\ConfigurationLoader\ErrorForwardingConfigurationLoader given, called in /mnt/c/Users/urban/unsynced/gerrit/mediawiki/core/vendor/wikimedia/object-factory/src/ObjectFactory.php on line 184
Backtrace:
#0 /mnt/c/Users/urban/unsynced/gerrit/mediawiki/core/vendor/wikimedia/object-factory/src/ObjectFactory.php(184): GrowthExperiments\Specials\SpecialHomepage->__construct(GrowthExperiments\AqsEditInfoService, GrowthExperiments\NewcomerTasks\ConfigurationLoader\ErrorForwardingConfigurationLoader)
#1 /mnt/c/Users/urban/unsynced/gerrit/mediawiki/core/vendor/wikimedia/object-factory/src/ObjectFactory.php(102): Wikimedia\ObjectFactory::getObjectFromSpec(array, array)
#2 /mnt/c/Users/urban/unsynced/gerrit/mediawiki/core/includes/specialpage/SpecialPageFactory.php(447): Wikimedia\ObjectFactory->createObject(array, array)
#3 /mnt/c/Users/urban/unsynced/gerrit/mediawiki/core/includes/MediaWiki.php(257): MediaWiki\Special\SpecialPageFactory->getPage(string)
#4 /mnt/c/Users/urban/unsynced/gerrit/mediawiki/core/includes/MediaWiki.php(967): MediaWiki->performRequest()
#5 /mnt/c/Users/urban/unsynced/gerrit/mediawiki/core/includes/MediaWiki.php(530): MediaWiki->main()
#6 /mnt/c/Users/urban/unsynced/gerrit/mediawiki/core/index.php(46): MediaWiki->run()
#7 {main}