[FIXED] 403 Forbidden (error code: 50001): Missing Access when adding role | discord.py

Issue

I am trying to ass different roles to people rapidly to give users the impression of their name being rainbow ( yes I know its against TOS ), and I am starting by adding roles to people before I remove them. However, when adding roles I get the error in the title of this post. I have looked into this and tried quite a few ways to fix it. The bot has a higher role than the roles being give out. Here is my code and the output:

import discord
from discord.ext import commands

bot = commands.Bot(command_prefix="$")
role_name = "Rainbow Six Seige"
peopleWithRole = []
guild = discord.Guild 

@bot.event
async def on_ready():
    print("Logged in as")
    print(bot.user.name)
    print("------")
    guild = bot.guilds[0]
    colours = [discord.utils.get(guild.roles, name='red'),
               discord.utils.get(guild.roles, name='green'),
               discord.utils.get(guild.roles, name='blue')
               ]

    role = discord.utils.find(
        lambda r: r.name == role_name, guild.roles)
        
    for user in guild.members:
        if role in user.roles:
            peopleWithRole.append(user)

    for color in colours:
        for user in peopleWithRole:
            await user.add_roles(color)

bot.run("my token")

output:

Logged in as
test bot
------
Ignoring exception in on_ready
Traceback (most recent call last):
  File "C:\Users\User\AppData\Local\Programs\Python\Python38-32\lib\site-packages\discord\client.py", line 312, in _run_event
    await coro(*args, **kwargs)
  File "C:\Users\User\Desktop\test\test.py", line 29, in on_ready
    await user.add_roles(color)
  File "C:\Users\User\AppData\Local\Programs\Python\Python38-32\lib\site-packages\discord\member.py", line 641, in add_roles
    await req(guild_id, user_id, role.id, reason=reason)
  File "C:\Users\User\AppData\Local\Programs\Python\Python38-32\lib\site-packages\discord\http.py", line 241, in request
    raise Forbidden(r, data)
discord.errors.Forbidden: 403 Forbidden (error code: 50001): Missing Access

Solution

Make sure you have a role given to the bot which has access to managing roles. Also when you add the bot from the dev portal you can give it permissions needed.

Best practice for verified bots is to make a role called BOT with all the permissions and give it to all the bots you have in the server

Answered By - Abdulaziz