DO IT on this block to see if it return empty string.
sorry I still don't understand, can you explain in more detail?
are you sure you get the correct base64 string ?
I previously used that extension in Kodular, is it different in App Inventor?
You need to connect the ai2companion first.
oh okay
Now you know the reason
does that mean i am using the wrong extension?
Try removing the file:// prefix using the replacement block.
does that mean the extension is not used?
No, you feed that into the extension block. If you had read the tooltip / documentation, the base64 extension is expecting an absolute path, not a full path.
You can read more about that here:
