I have exactly the same. On both browsers. I hadn't this problem two weeks ago.
Edit:
I was trying to remember what I've changed meanwhile in preferences, which you mentioned and it was Code Editor. I set again default values and it worked.
Reg...
Hi Kenichi,
in my case structure of it_operation_info doesn't have such fields like content_id or content_id_ref.
The structure is /IWBEP/S_MGW_OPERATION_INFO. It has only:
ENTITY_TYPE
ENTITY_SET
ACTION_NAME
OPERATION_TYPE
Was it changed by some ...