3235180 - Error "Enter the transaction activity" when creating return order by SD Fiori apps

• When trying to use Fiori app 'F1708 - Manage Customer Returns' or 'F4832 - Manage Customer Returns - Version 2' to create a return order, the following pop-up message appears:
  
  "Enter the transaction activity"。
  
  
• Also, when using the Developer tools (F12) of the web browser, the following error can be found in the Console tab:
  
  HTTP request failed (400 Bad Request): {"error":{"code":"SLS_LORD/001","message":{"lang":"en","value":"Enter the transaction activity"},"innererror":{"application":{"component_id":"SD-SLS-RE","service_namespace":"/SAP/","service_id":"SD_F2651_CRT_CREATE_SRV","service_version":"0001"},"transactionid":".........","timestamp":"","Error_Resolution":{"SAP_Transaction":"","SAP_Note":"See SAP Note 1797736 for error analysis (https://service.sap.com/sap/support/notes/1797736)","Batch_SAP_Note":"See SAP Note 1869434 for details about working with $batch (https://service.sap.com/sap/support/notes/1869434)"},"errordetails":[{"ContentID":"","code":"SLS_LORD/001","message":"Enter the transaction activity","propertyref":"","severity":"success","transition":false,"target":""},{"ContentID":"","code":"/IWBEP/CX_MGW_BUSI_EXCEPTION","message":"Enter the transaction activity","propertyref":"","severity":"error","transition":false,"target":""}]}}}....

• Fiori
• SAP S/4HANA
• SAP S/4HANA Cloud Private Edition

CBAR, SD_F2651_CRT_CREATE_SRV, SLS_LORD/001, Enter the transaction activity, F1708, Manage Customer Returns, F4832, Manage Customer Returns - Version 2, vov8,  , KBA , SD-SLS-RE , Returns , SD-FIO-SLS , Sales Apps , Problem