IT KEEPS SAYING THAT SOMETHING'S WRONG, BUT DOESN'T TELL ME WHAT THE PROBLEM IS. IT'S NOT REMOVING THE BACKGROUNDS OF THE PICTURED I WANT

I keep getting “something went wrong. please try again!” i had this app remove me only 2 images’ backgrounds. and i still have 3 more to go. and it’s not working at all, despite my internet connection being fully functioning.