This article describes an an error message that appears in the error logging after having upgraded to EPiServer.Commerce 11.2.6. This error was introduced with a new set of commerce stored procedures.
The number of rows provided for a FETCH clause must be greater then zero
The stack trace may have the following entry as well.
http://<our site name>/adminui/cms/Stores/contentstructure/?query=activitiesnotready&sort(+name)