_dictionaryEntry schema registration showed "wrong formatted resource name"

[cloudsearch555]

According to the doc, Synonyms are defined by indexing items with the _dictionaryEntry well-known schema.

However when register the object _dictionaryEntry with properties: _term, _synonym; wrong formatted resource name popped up.

[ERROR] {
[ERROR] "code" : 400,
[ERROR] "errors" : [ {
[ERROR] "domain" : "global",
[ERROR] "message" : "Wrong formatted resource name. Wrong formatted resource name. Wrong formatted resource name. Wrong formatted resource name. Wrong formatted resource name.",
[ERROR] "reason" : "badRequest"
[ERROR] } ],
[ERROR] "message" : "Wrong formatted resource name. Wrong formatted resource name. Wrong formatted resource name. Wrong formatted resource name. Wrong formatted resource name.",
[ERROR] "status" : "INVALID_ARGUMENT"
[ERROR] }

[dtssagio]

Same problem here!

[vitoing]

Has anyone solved this problem? I tried this morning but got the same error. Schema is the same found in example. Thanks