Broken page count sort when included with a date range

[duckduckgrayduck]

Works:

GET
https://api.www.documentcloud.org/api/documents/search/?expand=user,organization,projects&q=created_at:[2013-01-01T00\:00\:00Z TO 2014-01-01T23:59:59Z] sort:-page_count &hl=true&version=2.0&per_page=25

Doesn't work:

https://api.www.documentcloud.org/api/documents/search/?expand=user,organization,projects&q=created_at:[2013-01-01T00\:00\:00Z TO 2014-01-01T23:59:59Z] sort:page_count &hl=true&version=2.0&per_page=25

[duckduckgrayduck]

Related Sentry error dump:

Solr Error: User: sanjin Query Params: <QueryDict: {'expand': ['user,organization,projects'], 'hl': ['true'], 'per_page': ['25'], 'q': ['created_at:[2013-01-01T00\\:00\\:00Z TO 2014-01-01T23\\:59\\:59Z] sort:page_count '], 'version': ['2.0']}> Exc: Solr responded with an error (HTTP 400): [Reason: Error from server at null: parsing error]

0	<SimpleLazyObject: <User: sanjin>>
1	{expand: user,organization,projects,hl: true,per_page: 25,q: created_at:[2013-01-01T00:00:00Z TO 2014-01-01T23:59:59Z] sort:page_count ,version: 2.0}
2	SolrError('Solr responded with an error (HTTP 400): [Reason: Error from server at null: parsing error]')

[duckduckgrayduck]

This may be a backend issue, need to dig into it more