FormApi/UI Image

Im want a custom Image in my UI but its only loading: after a time is going to:
and this is my code:

can you help me pls


$form->addButton("Fly ", 1, "https://www.bilder-upload.eu/bild-c2ed25-1622053817.jpg.html");

 

HTML isn't a valid image type.
The link image redirects to https://www.bilder-upload.eu/upload/c2ed25-1622053817.jpg,
Use this:

PHP:

$form->addButton("Fly ", 1, "https://www.bilder-upload.eu/upload/c2ed25-1622053817.jpg");

 

how did you make to show the Pictures Big and not on that site?

 

Right click the image, Copy Image address, then paste it it to the code.