[Empty Clauses were deprecated][1]. Use `match_all` just like you do in your `query` clause.

{ "query": {"match_all": {}} ,"aggs": { "price": { "aggs": { "tt": { "terms": { "field": "platformType" } } }, "filter": { "match_all": {} } } } }

[1]: https://github.com/elastic/elasticsearch/issues/17540

Using the above I get
`[term] malformed query, expected [END_OBJECT] but found [FIELD_NAME]`
This worked for me
Updated for Elasticsearch 5.6.4 +
{ "query": { "bool": { "must": [ {"term": {"shape": "round"}}, {"bool": { "should": [ {"term": {"color": "red"}}, {"term": {"color": "blue"}} ] }} ] } } }