List index out of range - pygame animations

Question

I am working on a 2d platformer game and I am having an issue where the list index cannot get the image for the player. Here is my player.py:

import pygame
from support import import_folder


class Player(pygame.sprite.Sprite):
    def __init__(self, pos):
        super().__init__()
        self.import_character_assets()
        self.frame_index = 0
        self.animation_speed = 0.15
        self.image = self.animations['idle'][self.frame_index]
        self.rect = self.image.get_rect(topleft=pos)

        # PLAYER MOVEMENT
        self.direction = pygame.math.Vector2(0, 0)
        self.speed = 8
        self.gravity = 0.8
        self.jump_speed = -16

    def import_character_assets(self):
        character_path = '../graphics/character'
        self.animations = {'idle': [], 'run': [], 'jump': [], 'fall': []}

        for animation in self.animations.keys():
            full_path = character_path + animation
            self.animations[animation] = import_folder(full_path)

and here is where I use os to select the directory and images:

from os import walk
import pygame


def import_folder(path):
    surface_list = []

    for _, __, img_files in walk(path):
        for image in img_files:
            full_path = path + '/' + image
            image_surf = pygame.image.load(full_path).convert_alpha()
            surface_list.append(image_surf)

    return surface_list

Here is the Index error:

Traceback (most recent call last):
  File "C:\Users\ejvid\PycharmProjects\Platformer1\Platformer\1 - Basic platformer\code\main.py", line 10, in <module>
    level = Level(level_map, screen)
  File "C:\Users\ejvid\PycharmProjects\Platformer1\Platformer\1 - Basic platformer\code\level.py", line 11, in __init__
    self.setup_level(level_data)
  File "C:\Users\ejvid\PycharmProjects\Platformer1\Platformer\1 - Basic platformer\code\level.py", line 26, in setup_level
    player_sprite = Player((x, y))
  File "C:\Users\ejvid\PycharmProjects\Platformer1\Platformer\1 - Basic platformer\code\player.py", line 11, in __init__
    self.image = self.animations['idle'][self.frame_index]
IndexError: list index out of range

Process finished with exit code 1