Unable to create S3 repository

[nareshm_399]

{
"error" : {
"root_cause" : [ {
"type" : "repository_exception",
"reason" : "[logs_backup] failed to create repository"
} ],
"type" : "repository_exception",
"reason" : "[logs_backup] failed to create repository",
"caused_by" : {
"type" : "illegal_argument_exception",
"reason" : "Unknown [repository] type [s3]"
}
},
"status" : 500
}