[PyGame] Error: Couldn't open image

[DotGuy]

Hello, I have recently started following a pygame flappy bird tutorial series.

In the code that he shows in the tutorial he loads a few images, I have downloaded them and put them in a file just like he did but whenever I run the code that is in the tutorial I get this error:

Error:
Traceback (most recent call last):line 10, in <module>
    bird_imgs = [pygame.transform.scale2x(pygame.image.load(os.path.join("imgs", "bird1.png")))]
pygame.error: Couldn't open imgs\bird1.png

here is the code that i wrote by now:

import os
import random
import pygame
import time
import neat

win_width = 600
win_height = 800

bird_imgs = [pygame.transform.scale2x(pygame.image.load(os.path.join("imgs", "bird1.png"))), pygame.transform.scale2x(pygame.image.load(os.path.join("imgs", "bird2.png"))), pygame.transform.scale2x(pygame.image.load(os.path.join("imgs", "bird3.png")))]
pipe_img = pygame.transform.scale2x(pygame.image.load(os.path.join("imgs", "pipe.png")))
base_img = pygame.transform.scale2x(pygame.image.load(os.path.join("imgs", "base.png")))
bg_img = pygame.transform.scale2x(pygame.image.load(os.path.join("imgs", "bg.png")))

class Bird:
    imgs = bird_imgs
    max_rotation = 25
    rotation_velocity = 20
    animation_time = 5

    def __init__(self, x, y):
        self.x = x
        self.y = y
        self.tilt = 0
        self.tick_count = 0
        self.vel = 0
        self.height = self.y
        self.img_count = 0
        self.img = self.imgs[0]
    def jump(self):
        self.vel = -10.5
        self.tick_count = 0
        self.height = self.y

    def move(self):
        self.tick_count += 1

        d = self.vel*self.tick_count + 1.5*self.tick_count**2

        if d >= 16:
            d = 16

        if d < 0:
            d -= 2

        self.y = self.y + d

        if d < 0 or self.y < self.height + 50:
            if self.tilt < self.max_rotation:
                self.tilt = self.max_rotation
        else:
            if self.tilt > -90:
                self.tilt -= self.rotation_velocity

    def draw(self, win):
        self.img_count *= 1

        if self.img_count < self.animation_time:
            self.img = self.imgs[0]
        elif self.img_count < self.animation_time*2:
            self.img = self.imgs[1]
        elif self.img_count < self.animation_time*3:
              self.img = self.imgs[2]
        elif self.img_count < self.animation_time*4:
              self.img = self.imgs[1]
        elif self.img_count == self.animation_time*4 + 1:
              self.img = self.imgs[0]
              self.img_count = 0

        if self.tilt <= -80:
            self.img = self.imgs[1]
            self.img_count = self.animation_time*2

        rotated_image = pygame.transform.rotate(self.img, self.tilt)
        new_rect = rotated_image.get_rect(center=self.img.get_rect(topleft = (self.x, self.y)).center)
        win.blit(rotated_image, new_rect.topleft)

    def get_mask(self):
        return pygame.mask.from_surface(self.img)

def draw_window(win, bird):
    win.blit(bg_img, (0,0))
    pygame.display.update()

def main():
    bird = Bird (200, 200)
    win = pygame.display.set_mode((win_width, win_height))

    run = True
    while run:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False

            draw_window(win, bird)

    pygame.quit()
    quit()

here are the links to the episodes of the series that i watched by now:

https://www.youtube.com/watch?v=MMxFDaIOHsE&t=213s
https://www.youtube.com/watch?v=ps55secj7iU

If it helps, I use the pycharm IDE.

Can someone please help me or tell me if im doing something wrong?