react-native-fetch-blob uploading failure

Question

i use react-native-fetch-blob to send images to spring server. but when i send state it didn't work. the first code is working well but second code is not working. i couldn't find problem between the first and second code.

if (this.state.uri.didCancel) {
            }
            else if (this.state.uri.error) {
            }
            else if (this.state.uri.customButton) {
            }
            else {
                let source = { uri: this.state.uri }
                RNFetchBlob.fetch('POST',  'https://a89ab0aa.ngrok.io/spring01/up', {
                    'Content-Type': 'multipart/form-data',
                }, 
                [{ name: 'file', filename: 'abc.jpg', data: RNFetchBlob.wrap(this.state.uri) }]
                ).then((res) => {
                    })
                    .catch((err) => {
                        // error handling ..
                    })
                this.setState({
                    imagereturn: source
                });
            }
  }

it works well

newimages = [...this.state.images, { name: 'file', fileName: 'abc.jpg', data: RNFetchBlob.wrap(this.state.uri) } ];
  this.setState({
    images:newimages,
  })

if (this.state.uri.didCancel) {
            }
            else if (this.state.uri.error) {
            }
            else if (this.state.uri.customButton) {
            }
            else {
                let source = { uri: this.state.uri }
                RNFetchBlob.fetch('POST',  'https://a89ab0aa.ngrok.io/spring01/up', {
                    'Content-Type': 'multipart/form-data',
                }, 
                this.state.images
                ).then((res) => {
                    })
                    .catch((err) => {
                        // error handling ..
                    })
                this.setState({
                    imagereturn: source
                });
            }
  }

it doesnt work