uploadItem. code = 22

[chinamingsss]

My code :
var savePath = remotePath
if(savePath.hasSuffix("/")){
savePath = "(savePath)(localUrl.lastPathComponent)"
}else{
savePath = "(savePath)/(localUrl.lastPathComponent)"
}
self.client?.uploadItem(at: localUrl, toPath: savePath, progress: { bytes in
print("(bytes)")
return true
}, completionHandler: { error in
if error != nil {
print("(String(describing: error))")
} else {
print("success")
}
})

the savePath is. /testFloder/welcome_1.pdf

This folder is a folder under the share folder. I want to transfer files to this folder, but the error message is as follows:

Optional(Error Domain=NSPOSIXErrorDomain Code=22 "Invalid argument" UserInfo={NSLocalizedFailureReason=Error code 22: Open failed with (0xc000000d) STATUS_INVALID_PARAMETER.})