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[TypeError] 
call_user_func_array(): Argument #1 ($callback) must be a valid callback, non-static method MyClass::OnBeforeEventSendHandler() cannot be called statically (0)
/home/f/fenster/tech-fenter/public_html/bitrix/modules/main/tools.php:5261
#0: ExecuteModuleEventEx(array, array)
	/home/f/fenster/tech-fenter/public_html/bitrix/modules/main/lib/mail/event.php:282
#1: Bitrix\Main\Mail\Event::handleEvent(array)
	/home/f/fenster/tech-fenter/public_html/bitrix/modules/main/lib/mail/eventmanager.php:116
#2: Bitrix\Main\Mail\EventManager::executeEvents()
	/home/f/fenster/tech-fenter/public_html/bitrix/modules/main/lib/mail/eventmanager.php:36
#3: Bitrix\Main\Mail\EventManager::checkEvents()
	
#4: call_user_func_array(array, array)
	/home/f/fenster/tech-fenter/public_html/bitrix/modules/main/lib/application.php:872
#5: Bitrix\Main\Application->runBackgroundJobs()
	/home/f/fenster/tech-fenter/public_html/bitrix/modules/main/lib/application.php:387
#6: Bitrix\Main\Application->terminate(integer)
	/home/f/fenster/tech-fenter/public_html/bitrix/modules/main/lib/application.php:339
#7: Bitrix\Main\Application->end()
	/home/f/fenster/tech-fenter/public_html/bitrix/modules/main/classes/general/main.php:3711
#8: CMain::FinalActions(string)
	/home/f/fenster/tech-fenter/public_html/bitrix/modules/main/include/epilog_after.php:61
#9: require(string)
	/home/f/fenster/tech-fenter/public_html/order/payment.php:9
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