Same error as in TID TID7011283,

in the forum, there is no solution found.

TID mentiones:

Sometimes the problem may be that SAP is not getting the value of LANGU.
To validate that LANGU is a valid Command Type SAP may use 4 types
LANGU, LANG_ISO, e-MAIL, and Telephone
BAPI in SAP. In some cases on the SAP side a rule may be set up where
it needs all the values or an error will happen. The solution is to
query for these values ​​for the set default SAP.

can someone explain this 'solution' to me? Do I have to set an
additional parameter in the event? does the SAP guys need to change
something? and if so, what do they need to change?

any help....