React for user role doesn't work - discord.py

Question

I'm just building a discord bot for my discord server with discord.py. I made a code, but it won't work. It creates the message and you can react. Even the first debug message comes: User reacted to message.

But it won't give me the role. This is my code:

async def reactMsg(ctx):

    send_sub = await ctx.message.channel.send("React to this message to subscribe NPT.")
    reactions = ['✅']
    for i in reactions:
        await send_sub.add_reaction(i)

@client.event
async def on_raw_reaction_add(payload):
    #You forgot to await the bot.get_channel
    channel = client.get_channel(payload.channel_id)
    message = await channel.fetch_message(payload.message_id)
    guild = client.get_guild(payload.guild_id)
    #Put the following Line
    member = guild.get_member(payload.user_id)
    reaction = discord.utils.get(message.reactions, emoji=payload.emoji.name)

    print("Debug: User reacted to message")

    # only work if it is the client
    if payload.user_id == client.user.id:
        return

    if payload.message_id == 943634886642765874 and reaction.emoji == '✅':
        roles = discord.utils.get(guild.roles, name='TrackerSub')
        await member.add_roles(roles)
        await reaction.remove(payload.member)
        print("Debug: Give role to user")

Any ideas what I made wrong?