I would like to change some of the sprites in my vector tile basemap. I upload a png but get an error when trying to apply the changes (bottom left on the screen capture). Can someone let me know why this is happening and how to fix it? I downloaded the new sprite from one of the other vector basemaps so I can't figure out why it won't work.

On another note, sometimes when I click on a sprite to edit its colour half of the web page gets cut off and all I can see is the bottom portion of the page. So I have to click to go back to the previous page and then click on the sprite again. I have also been receiving errors when trying to apply new sprite colours. I've been trying to make the changes in a Microsoft Edge web browser.
