Unable to block users after upgrading to MW 1.39.1 and DiscorNotifications 1.1.4 (according to the Special:Version info)

[Kiokurashi]

I get this error (with internal paths trunicated to important parts) whenever we try to block a user and have this extension enabled.

[19c2ae4815c59a70cde895cd]  /Special:Block/TestUser Error: Call to undefined method MediaWiki\Block\DatabaseBlock::getTarget()

Backtrace:

from   /extensions/DiscordNotifications/DiscordNotificationsCore.php(418)
#0   /includes/HookContainer/HookContainer.php(338): DiscordNotificationsCore::onDiscordUserBlocked()
#1   /includes/HookContainer/HookContainer.php(137): MediaWiki\HookContainer\HookContainer->callLegacyHook()
#2   /includes/HookContainer/HookRunner.php(1039): MediaWiki\HookContainer\HookContainer->run()
#3   /includes/block/BlockUser.php(604): MediaWiki\HookContainer\HookRunner->onBlockIpComplete()
#4   /includes/block/BlockUser.php(532): MediaWiki\Block\BlockUser->placeBlockInternal()
#5   /includes/block/BlockUser.php(466): MediaWiki\Block\BlockUser->placeBlockUnsafe()
#6   /includes/specials/SpecialBlock.php(922): MediaWiki\Block\BlockUser->placeBlock()
#7   /includes/specials/SpecialBlock.php(1036): SpecialBlock::processFormInternal()
#8   /includes/htmlform/HTMLForm.php(725): SpecialBlock->onSubmit()
#9   /includes/htmlform/HTMLForm.php(615): HTMLForm->trySubmit()
#10   /includes/htmlform/HTMLForm.php(631): HTMLForm->tryAuthorizedSubmit()
#11   /includes/specialpage/FormSpecialPage.php(209): HTMLForm->show()
#12   /includes/specialpage/SpecialPage.php(701): FormSpecialPage->execute()
#13   /includes/specialpage/SpecialPageFactory.php(1428): SpecialPage->run()
#14   /includes/MediaWiki.php(316): MediaWiki\SpecialPage\SpecialPageFactory->executePath()
#15   /includes/MediaWiki.php(904): MediaWiki->performRequest()
#16   /includes/MediaWiki.php(562): MediaWiki->main()
#17   /index.php(50): MediaWiki->run()
#18   /index.php(46): wfIndexMain()
#19 {main}