审计日记导入失败

审计日志导入失败，集群之前是2.1.6，现在升级到了3.0.5，audit_log自己也重新建过了，报错内容如下:

[AuditStreamLoader.loadBatch():150] failed to load audit via AuditLoader plugin with label: audit_log_20250612_144139_17_127_0_0_1_7030
java.lang.Exception: status is not TEMPORARY_REDIRECT 307, status: 200, response: {"status":"FAILED","msg":"errCode = 2, detailMessage = No backend available for load, please check the status of your backends., policy: computeNode=false | query=false | load=true | schedule=false | tags={\"location\" : \"invalid\"} | medium=null"}

webui上面能看见审计日志，同时也能下载。