I am working on a sharepoint 2010 application. All the applications were working fine until this monday when all the custom web parts and infopath forms with code behind have stopped working for apparently no reason at all.
In some forms, the error states
The custom code in the form cannot be run because sandboxed solutions are not enabled on the server farm.
I tried enabling sand boxed solutions using this way, but I couldn't find Microsoft SharePoint Foundation Sandboxed Code Service in the list of services.
What could've gone wrong with this? Is it possible that sandbox support has been officially ended?