为提高效率，请提供以下信息，问题描述清晰能够更快得到解决：
【 TiDB 使用环境】
集群版本v4.0.0，BR版本v4.0.0
【概述】 场景 + 问题概述
使用与集群版本相同的BR工具进行物理备份，将集群备份到s3协议的存储里，备份过程中中断
【备份和数据迁移策略逻辑】
备份命令如下：
AWS_ACCESS_KEY_ID=xxxxxx AWS_SECRET_ACCESS_KEY=xxxxxx /*****/tidb/tool/tidb-toolkit-v4.0.0-linux-amd64/bin/br backup full --pd=“xx.xx.xx.xx:2379” --checksum=false --storage=“xxxxx” --ratelimit=60 --s3.region=“xxxxx” --send-credentials-to-tikv=true --log-file="/****/{clustername}_{timestamp}.log" --s3.endpoint=“xxxxxx”
【问题】 当前遇到的问题
未在官网查询到相关的报错信息，无法确定原因
【TiDB 版本】
v4.0.0
【附件】
备份报错日志如下：
……
[2021/07/16 04:31:01.930 +08:00] [ERROR] [push.go:111] [“backup occur unknown error”] [error=“Io(Custom { kind: Other, error: “failed to put object Request ID: None Body: <?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?>\
InternalErrorWe encountered an internal error, please try again./tidb/{ClusterName}/202107160430/1_3253579_1589_610cef689c4b6f7522be5aab417531464ecb6c46aff7d4c295213ea9b9fee0a0_write.sst388af3aeboss/KDwgKQ0LHFMSDQATEQQDQTZ+OiwhNiENWUc=” })”] [stack=“github.com/pingcap/log.Error\
\t/go/pkg/mod/github.com/pingcap/log@v0.0.0-20200117041106-d28c14d3b1cd/global.go:42\
github.com/pingcap/br/pkg/backup.(*pushDown).pushBackup\
\t/home/jenkins/agent/workspace/build_br_multi_branch_v4.0.0/go/src/github.com/pingcap/br/pkg/backup/push.go:111\ngithub.com/pingcap/br/pkg/backup.(*Client).BackupRange\
\t/home/jenkins/agent/workspace/build_br_multi_branch_v4.0.0/go/src/github.com/pingcap/br/pkg/backup/client.go:475\ngithub.com/pingcap/br/pkg/backup.(*Client).BackupRanges.func2\
\t/home/jenkins/agent/workspace/build_br_multi_branch_v4.0.0/go/src/github.com/pingcap/br/pkg/backup/client.go:381”]
[2021/07/16 04:31:01.930 +08:00] [INFO] [client.go:445] [“backup range finished”] [take=59.600345202s]
[2021/07/16 04:31:01.930 +08:00] [INFO] [client.go:373] [“Backup Ranges”] [take=1m0.101904845s]
[2021/07/16 04:31:01.931 +08:00] [INFO] [ddl.go:407] ["[ddl] DDL closed"] [ID=2235e29b-088f-4461-9821-662a8147d3ce] [“take time”=1.173022ms]
[2021/07/16 04:31:01.931 +08:00] [INFO] [ddl.go:301] ["[ddl] stop DDL"] [ID=2235e29b-088f-4461-9821-662a8147d3ce]
[2021/07/16 04:31:01.935 +08:00] [INFO] [domain.go:607] [“domain closed”] [“take time”=5.207706ms]
[2021/07/16 04:31:01.935 +08:00] [INFO] [collector.go:172] [“Full backup Failed summary : total backup ranges: 12, total success: 11, total failed: 1”] [“backup total regions”=35800] [unitName=“range start:7480000000000000cd5f720000000000000000 end:7480000000000000cd5f72ffffffffffffffff00”] [error="msg:“Io(Custom { kind: Other, error: \“failed to put object Request ID: None Body: <?xml version=\\\\\\\"1.0\\\\\\\" encoding=\\\\\\\"UTF-8\\\\\\\"?>\\
InternalErrorWe encountered an internal error, please try again./tidb/{ClusterName}/202107160430/1_3253579_1589_610cef689c4b6f7522be5aab417531464ecb6c46aff7d4c295213ea9b9fee0a0_write.sst388af3aeboss/KDwgKQ0LHFMSDQATEQQDQTZ+OiwhNiENWUc=\” })” "] [errorVerbose=“msg:“Io(Custom { kind: Other, error: \“failed to put object Request ID: None Body: <?xml version=\\\\\\\"1.0\\\\\\\" encoding=\\\\\\\"UTF-8\\\\\\\"?>\\
InternalErrorWe encountered an internal error, please try again./tidb/{ClusterName}/202107160430/1_3253579_1589_610cef689c4b6f7522be5aab417531464ecb6c46aff7d4c295213ea9b9fee0a0_write.sst388af3ae</RequestIdboss/KDwgKQ0LHFMSDQATEQQDQTZ+OiwhNiENWUc=\” })” \ngithub.com/pingcap/br/pkg/backup.*pushDown).pushBackup\
\t/home/jenkins/agent/workspace/build_br_multi_branch_v4.0.0/go/src/github.com/pingcap/br/pkg/backup/push.go:113\ngithub.com/pingcap/br/pkg/backup(*Client).BackupRange\
\t/home/jenkins/agent/workspace/build_br_multi_branch_v4.0.0/go/src/github.com/pingcap/br/pkg/backup/client.go:475\
github.com/pingcap/br/pkg/backup.(*Client).BackupRanges.func2\
\t/home/jenkins/agent/workspace/build_br_multi_branch_v4.0.0/go/src/github.com/pingcap/br/pkg/backup/client.go:381\
runtime.goexit\
\t/usr/local/go/src/runtime/asm_amd64.s:1357”]
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