遇到如上的错误表明什么？

Exception in thread "main" java.lang.NoSuchMethodError: com.aliyun.credentials.Client.getCredential()Lcom/aliyun/credentials/models/CredentialModel; at com.aliyun.teaopenapi.Client.doRequest(Client.java:812) at com.aliyun.teaopenapi.Client.callApi(Client.java:1080) at com.aliyun.openplatform20191219.Client.authorizeFileUploadWithOptions(Client.java:46) at com.aliyun.imageseg20191230.Client.segmentCommodityAdvance(Client.java:723) at com.mayjoy.util.AliYunUtils.main(AliYunUtils.java:47)遇到如上的错误表明什么？