If you joined a game requiring a resource pack and accidentally declined it, then you need to install it to be able to join the game. You do not have to download the resource pack! This can be done, by disconnecting from the server. Click on CubeCraft in your server list and the press edit server. Make sure that server resource pack is Enabled. If you don't understand what I'm talking about, click this button (pictured below) till it says enabled. Then, when you join CubeCraft, the resource pack will be automatically downloaded, and be able to play the game! Please make sure you are running the latest version of Minecraft when playing on games that require resource packs, before asking for support!