HELP!!!

I'm a kid and i'm making a school project of a kangaroo game and when I'm drawing the sprites it happened a bug, I can't make new sprites and I don't now WHY!I want to know how to fix that bug, if someone can help , Please guys!

link of the game: https://microstudio.io/porquinhogamer/amostracultural/2BJ4EWJA/ Press space to dance and get more points or E to endless mode

i'm his friend helping him with the project, and as a bonus question, how do i make it appear in the explore section? it has 5 likes and still doesn't appear.

I had this too, and I just opened the app in mobile and spammed the life out of the sprite creation button

and... it worked?

I had the same error and I fixed it by remaking the project.