I want to "Allow setting a discount on the sales order lines" for Product Features under Settings > Configuration > Sales menu.

So I checked it and pressed Apply button but I get the following warning message:

"

Record cannot be modified right now

This cron task is currently being executed and may not be modified, please try again in a few minutes

"

But there is no cron / schedule job running. Is there anyone who can help me figure out why I get this message?

Thank you in advance.

Kibong.