Players can't see textures

My players can't see textures! But I've followed the whole tutorial

There are three ways to fix this issue:

• If your players can't see the new items just link them this simple screens to fix it! http://imgur.com/a/SG0AU

• If you still have problems delete the server from your servers list, add it again and then enable resource packs.

• If you still have problems leave the server, go to %appdata%/.minecraft/server-resource-packs and delete everything. Then join the server again.