Empty file.filepath and not generating on the set directory

[ginxx009]

if(granted === PermissionsAndroid.RESULTS.GRANTED) {
          let data = {
            html: '<h1>PDF TEST</h1>',
            fileName: 'test',
            directory: 'Documents',
          };
      
          let file = await RNHTMLtoPDF.convert(data)
          alert('Has been downloaded to : ', file.filePath);
        }

"react-native-html-to-pdf": "^0.12.0",
"react": "17.0.2",
"react-native": "^0.67.4",

multiDexEnabled true
buildToolsVersion = "30.0.2"
minSdkVersion = 21
compileSdkVersion = 30
targetSdkVersion = 30

What I tried so far is this link: #261 (comment)
but still no luck

Though I am using react-native 67 still used react-native link react-native-html-to-pdf

Can someone point out why it is not generating any pdf file on the document directory ?