image blank while using Image.Url tag

hi guys , i’m running into a little issue, i just want to display an image using my url

<ImageFill  Url="https://parsefiles.back4app.com/Zx3WX3qeN3WeJNioNrgaAETSOmGeiv0DdvIqYr70/49834ce80b34d59d605ab0d464a4630e_picture.txt&quot;  StretchMode="UniformToFill" />

result ==> blank image

You are serving that image with a .txt extension and a Content-Type: text/plain from your server. Try to change to .png and Content-Type: image/png then it should work.