视觉智能开放平台客户端的，unity，返回是BadRequest，出现这个报错要怎么解决？

视觉智能开放平台客户端的，unity，返回是BadRequest，url是 https://ocr.cn-shanghai.aliyuncs.com/?Signature=QxInc7QQaJ37waz%2fIjrJ6Vd3ZLc%3d&AccessKeyId=LTAI5tJJ4Fru1duM3ecegyr4&Action=RecognizeBankCard&ImageURL=http%3a%2f%2fviapi-test.oss-cn-shanghai.aliyuncs.com%2fviapi-3.0domepic%2focr%2fRecognizeBankCard%2fyhk1.jpg&SignatureMethod=HMAC-SHA1&SignatureNonce=46ce7c0a6209025e00f677512aa7b0a3&SignatureVersion=1.0&Timestamp=2024-04-03T08%3a54%3a25Z&Format=JSON&RegionId=cn-shanghai&Version=2019-12-30

Error: HTTP request failed: StatusCode: 400, ReasonPhrase: 'Bad Request', Version: 1.1, Content: System.Net.Http.HttpConnection+HttpConnectionResponseContent, Headers:
{
Date: Wed, 03 Apr 2024 09:03:18 GMT
Connection: keep-alive
Keep-Alive: timeout=25
Access-Control-Allow-Origin:
Access-Control-Expose-Headers:
x-acs-request-id: 1F080ECC-E5FA-55C7-BB44-3B9E37603F6B
x-acs-trace-id: cd8d3e3de56defa9aec30b0df7b98d65
Content-Type: application/json; charset=utf-8
Content-Length: 777
}