Question 2d textures not rendering correctly

I have just started using unity and decided to make a 2D platformer microgame. When I try to load the game, all the textures just turn out pink. Please help. My unity version is 2021.3.15f1.

 

Usually that is either a missing texture, missing material, or something else.

Press pause and start by studying the first pink thing you see. Drag a new material in, drag a new texture in, see what changes what.

 

actually, the textures don't load at all. even before playing the game.

 

Well we know textures work so start fiddling with it, go over the manual for how to import a texture, apply it to a Material, apply that material where you want, or do it with sprites or whatever you are trying to do.