Solution : https://service.sap.com/sap/support/notes/135803 (SAP Service marketplace login required)
Key words :
error message wa634 'type linkage bus2104 to_be_approved, additional key words wa634, receiver type ws00300022 select, object type bus2104, activating event linkage, flag 'enabled' active, activate event linking, event to_be_approved, approval workflow, appropriation requests
Related Notes :
| 118251 | Workflow approval of appropriation request |
| 36426 | Problems activating event type linkage |