Call to undefined method ReflectionUnionType::getName() due to specifying return types not added in Interface

[bonteke]

Description:
When running the Magento setup or DI compile command, the following error occurs due to specifying return types that were not added in the Interface of the class:

Call to undefined method ReflectionUnionType::getName()#0 /var/www/html/vendor/magento/framework/Interception/Code/Generator/Interceptor.php(105): Magento\Framework\Interception\Code\Generator\Interceptor->getReturnTypeValue(Object(ReflectionMethod))
#1 /var/www/html/vendor/magento/framework/Interception/Code/Generator/Interceptor.php(76): Magento\Framework\Interception\Code/Generator/Interceptor->_getMethodInfo(Object(ReflectionMethod))
#2 /var/www/html/vendor/magento/framework/Code/Generator/EntityAbstract.php(228): Magento\Framework\Interception\Code/Generator/Interceptor->_getClassMethods()
#3 /var/www/html/vendor/magento/framework/Interception/Code/Generator/Interceptor.php(177): Magento\Framework\Code/Generator/EntityAbstract->_generateCode()
#4 /var/www/html/vendor/magento/framework/Code/Generator/EntityAbstract.php(108): Magento\Framework\Interception/Code/Generator/Interceptor->_generateCode()
#5 /var/www/html/vendor/magento/framework/Code/Generator.php(133): Magento\Framework\Code/Generator/EntityAbstract->generate()
#6 /var/www/html/setup/src/Magento/Setup/Module/Di/Code/Generator.php(69): Magento\Framework\Code/Generator->generateClass('Tweakwise\\Magen...')
#7 /var/www/html/setup/src/Magento/Setup/Module/Di/App/Task/Operation/Interception.php(100): Magento\Setup\Module/Di/Code/Generator->generateList(Array)
#8 /var/www/html/setup/src/Magento/Setup/Module/Di/App/Task/Manager.php(56): Magento\Setup\Module/Di/App/Task/Operation/Interception->doOperation()
#9 /var/www/html/setup/src/Magento/Setup/Console/Command/DiCompileCommand.php(216): Magento\Setup\Module/Di/App/Task/Manager->process(Object(Closure), Object(Closure))
#10 /var/www/html/vendor/symfony/console/Command/Command.php(255): Magento\Setup\Console/Command/DiCompileCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#11 /var/www/html/vendor/symfony/console/Application.php(1021): Symfony\Component\Console/Command/Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#12 /var/www/html/vendor/symfony/console/Application.php(275): Symfony\Component\Console/Application->doRunCommand(Object(Magento\Setup\Console/Command/DiCompileCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#13 /var/www/html/vendor/magento/framework/Console/Cli.php(116): Symfony\Component\Console/Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#14 /var/www/html/vendor/symfony/console/Application.php(149): Magento\Framework\Console/Cli->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#15 /var/www/html/bin/magento(23): Symfony\Component\Console/Application->run()
#16 {main}

Steps to Reproduce:

1. Run the Magento setup or DI compile command.
2. Observe the error.

Expected Result:
The command should execute without errors.

Actual Result:
The command fails with the error mentioned above.

Additional Information:

• Magento version: Adobe Commerce ver. 2.4.5-p8
• PHP version: 8.1.27

Possible Solution:
Remove the return types from the methods in the class. File: vendor/tweakwise/magento2-tweakwise/Controller/Ajax/FacetAttributes.php