Here are some of the ways you can fix the issue
- Make sure you're on the latest version of Minecraft
- Restart Minecraft/delete Minecraft and re-download it
- Restart your computer
- Make sure you have the resource pack installed correctly, if not I would follow this guide http://forums.pokefind.co/index.php?threads/guide-server-resource-pack.44/page-2#post-3246
- Also some people fixed this issue by deleting their resource pack folder directly in the Minecraft %appdata% area or the in the Minecraft folder itself, so I would try that if the link above doesn't work.
If these options don't work at all feel free to contact me or a staff member on here or on discord, the #help section on discord is very helpful with things like these!
I hope this helps!
- Jadyn