Widgets throw error due to broken `\LanguageServiceFactory::create()`

[rintisch]

Bug Report

Current Behavior
Using the extension in a multilanguage setup the dashboard gets unaccessible due to the lines

cart/Classes/Widgets/Provider/OrdersPerDayProvider.php

Line 32 in 257cea6

$this->languageService = GeneralUtility::makeInstance(LanguageServiceFactory::class)->create($GLOBALS['BE_USER']->uc['lang']);

and

cart/Classes/Widgets/Provider/TurnoverPerDayProvider.php

Line 31 in 257cea6

$this->languageService = GeneralUtility::makeInstance(LanguageServiceFactory::class)->create($GLOBALS['BE_USER']->uc['lang']);

Expected behavior/output
Widget shall not lead to an error.

Environment

• TYPO3 version(s): 13.4.18
• cart version: 11.15.0
• Is your TYPO3 installation set up with Composer (Composer Mode): yes

Possible Solution
The given code can be replaced with

$this->languageService = $GLOBALS['LANG'];