System cannot find source storage bin

What causes this issue?

The system was not able to determine a source storage bin for this
material.
This problem can be caused for several reasons:
The material no longer exists in your warehouse.
The material is in your warehouse, but currently cannot be reached by
the system (for example, the material is just being transferred by one
of the conveyor machines).
The material is in your warehouse, but not in the storage type and
storage areas that are defined in your system for the material search.

How to fix this error?

Check to see if the material really exists in your warehouse.
If the reason for the error is the third one mentioned above, contact
your system administrator.

Error message extract from SAP system. Copyright SAP SE.