failed to approve LIA certificate due to internal error

can anybody please help me in this regards, detail error is mention below { "affectedEntities": [], "commandID": "10.10.21.49<->48", "failAsWarning": false, "untrustedCertificateThumbprint": null, "commandState": "failed", "startTime": "2019-03-13T20:59:48.656Z", "completionTime": "2019-03-13T20:59:51.765Z", "message": "Command failed: Failed to approve LIA certificate (node: [10.10.21.49]) due to: Internal Error", "result": null, "weakDependencies": [], "followingCommand": "None", "node": { "ostype": "windows", "nodeName": null, "nodeIPs": [ "10.10.21.49" ], "domain": null, "userName": null, "password": null, "liaPassword": "********" }, "targetEntityIdentifier": "10.10.21.49", "allowedPhase": "configure", "archived": false, "commandName": ".ApproveLiaCertificateCommand", "commandParameters": [], "defaultErrorMessage": null }