Question: I try add sandbox solution to SharePoint 2013 on subsite with event reciver on list, and don't work ;( 

On Root Web is O.K. event fired and do something what I wont, but when I activate feature on subsite then list was created but event don't working. 

Does anyone know why? I don't have access to Farm server, so I can't doing something on web.config or Central Administration.

Answer: 
No, it's not possible as certain Windows Server role/feature installation methods have changed.
Yes It possible but some difficult you wait

<https://sharepoint-ru.blogspot.com/2021/07/sharepoint-2013-windows-server-20162019.html>