Solr HTTP error: OK (400) {"error":{"msg":"org.apache.solr.search.SyntaxError: Cannot parse 'text:': Encountered \"\" at line 1, column 5.\r\nWas expecting one of:\r\n ...\r\n \"(\" ...\r\n \"*\" ...\r\n ...\r\n ...\r\n ...\r\n ...\r\n ...\r\n \"[\" ...\r\n \"{\" ...\r\n ...\r\n ...\r\n ","code":400}}