[TypeError] 
call_user_func_array(): Argument #1 ($callback) must be a valid callback, non-static method dkdev_extmail::addMailData() cannot be called statically (0)
/home/c/cg99766/public_html/bitrix/modules/main/classes/general/module.php:480
#0: ExecuteModuleEventEx(array, array)
	/home/c/cg99766/public_html/bitrix/modules/main/classes/general/event.php:63
#1: CAllEvent::Send(string, string, array)
	/home/c/cg99766/public_html/bitrix/modules/security/classes/general/antivirus.php:185
#2: CSecurityAntiVirus::OnPageStart()
	/home/c/cg99766/public_html/bitrix/modules/main/classes/general/module.php:480
#3: ExecuteModuleEventEx(array)
	/home/c/cg99766/public_html/bitrix/modules/main/include.php:163
#4: require_once(string)
	/home/c/cg99766/public_html/bitrix/modules/main/include/prolog_before.php:14
#5: require_once(string)
	/home/c/cg99766/public_html/bitrix/modules/main/include/prolog.php:10
#6: require_once(string)
	/home/c/cg99766/public_html/bitrix/header.php:1
#7: require(string)
	/home/c/cg99766/public_html/404.php:7
#8: include_once(string)
	/home/c/cg99766/public_html/bitrix/urlrewrite.php:4
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