**Which product are you using?**
PDF.js Express Viewer
**PDF.js Express Version**
8.7.5
**Detailed description of issue**
I’m currently working on a .NET 9 Blazor Hybrid + Web App project where I use the PDF.js Express Viewer for opening PDF-files. For implementing the PDF-viewer in my project I used the documentation [Integrating PDF.js Express Viewer into an existing Blazor project](https://pdfjs.express/documentation/get-started-viewer/blazor/exist-project) which worked great. And it now works on the Web and Windows App, without any problems.
However in my Android App I get an error message (404), see picture below, when I want to use the PDF-viewer. And when I open my browser devtools I get the same error message as on the screen, without any extra information.
Note: All the apps use the same Blazor code, by using a Razor Class Library (RCL). So the same Blazor, C#, CSS and JavaScript code is used for web, Windows and Android.
**Expected behaviour**
The expected behavior is that the PDF-viewer is opened and displaying a file, the initial file is good enough to begin with.
**Does your issue happen with every document, or just one?**
It only happens on Android, but with every document. Even when you don’t add a initialDoc.
**Link to document**
The initialDoc is the file from the documentation: [https://pdftron.s3.amazonaws.com/downloads/pl/demo-annotated.pdf](https://pdftron.s3.amazonaws.com/downloads/pl/demo-annotated.pdf).
**Code snippet**
Home.razor
```javascript
```
Home.razor.cs
```javascript
public partial class Home : IAsyncDisposable
{
[Inject]
public IJSRuntime JS { get; set; }
private string _pdfBase64String = string.Empty;
protected override async Task OnAfterRenderAsync(bool firstRender)
{
if (!firstRender) { return; }
var fileName = "GAC_RG_TEKE_01.pdf";
var searchValue = "tlTAtri_PT-001";
_pdfBase64String = ""; // Filled by API
await JS.InvokeAsync