Error changing the screen background

[mynikalp (myNiKa)]

Hello,
i have a problem changing the background image with the blocks. With the test mode “Companion” this works without problems.
If you download the app from the store, the app asks for permission to access the media files. If you click on “Agree”, the background image does not change.
I have uploaded the images in the assets

Can anyone help me?

[Peter (Moderator)]

remove the //

[mynikalp (myNiKa)]

Cool thank you that works. I thought // has to stand everywhere. So it was at least for the .csv file.