No product (with change authorization) has been selected for planning

What causes this issue?

Possible causes include:
You are in the order view and have chosen <ls>Plan product</> but you
have not selected a specific product by double-clicking on it in the
tree.
In the order view, you have double-clicked on <ls>Product receipts</>
or <ls>Product requirements</> in the tree. You are in the Product
receipts or requirements table and have chosen <ls>Plan product</>. You
have, however, not selected a product or products in the table.

System Response

The system cannot plan the product(s).

How to fix this error?

Double-click on the product you would like to plan in the tree and then
choose <ls>Plan product</>.
If you are in the product receipts/requirements table, select the
product(s) you would like to plan and then choose <ls>Plan product</>.

Error message extract from SAP system. Copyright SAP SE.