No available sand-boxed code
execution server could be found.
Issue: No available sand-boxed code execution server could be
found while running the sand-boxed solutions.
Cause: Sandbox Code Service is not started/not configured
properly
Solution: Ensure that the below service is started.
Go to SharePoint Central
Administration site > System Settings > Manage services on
server
Microsoft SharePoint Foundation Sand-boxed Code Service
I hope the above information will help you to resolve the issue, in case of any queries/questions regarding the above mentioned information then please let me know. I would be more than happy to help you as well as resolves your issues, Thank you.
