As per usual, I'm having problems with my level wot is currently in construction. When I try to run the level, it gives me the following message:

"Layer 7 cannot be X-tiled because it is too large.

If you align the width of the layer on 4 tiles, it will be able to X-tile."

Considering the second line was kinda-sorta vague, I don't know what I'm supposed to do. Could someone help me out here plz thanks?