This error shows when uploading my texpack on https://garbage.loan:

Zip file must contain any of the following: animations.png, animations.txt, char.png, clouds.png, default.png, gui.png, icons.png, particles.png, rain.png, snow.png, terrain.png, touch.png, skybox.png

But my file contains the following (After unzipping):

animations.png

clouds.png

icons.png

readme.txt

touch.png

animations.txt

default.png

particles.png

snow.png

char.png

gui.png

rain.png

terrain.png

File attached for reference, any help would be appreciated!

classicube.zip

readme.txt isn't included in the list of allowed files. Did you try removing that from your zip before uploading?