In My account > Collaboration > Item Approval, there is the possibility to "Add comment", "Approve" or "Deny" an object publication.

Try to add a comment "Test comment" and click the button but the page just reload without change.
The error.log is showing:
Error (1400): ORA-01400: cannot insert NULL into ("EZ406"."EZCOLLAB_SIMPLE_MESSAGE"."DATA_TEXT2")
Failed query at offset 236:
INSERT INTO ezcollab_simple_message (message_type, data_text1, data_text2, data_text3, data_int1, data_int2, data_int3, data_float1, data_float2, data_float3, creator_id, created, modified) VALUES('ezapprove_comment', 'test comment 4', , , 0, 0, 0, 0.000000, 0.000000, 0.000000, 27187, 1282818488, 1282818488)

Start of error:
, , 0, 0, 0, 0.000000, 0.000000, 0.000000, 27187, 1282818488, 1282818488)