DC Bot Error

import discord
import datetime
import json
from commands import setup, close

class Constants:
    INVITEURL = "https://discordapp.com/oauth2/authorize?client_id=692371091368443945&scope=bot&permissions=805314622"
    TOKEN = ""
    PREFIX = "tt+"


client = discord.Client()
commands = {
    "setup": {"help": "Mit diesem Befehl kannst du dein eigenes Ticket System konfigurieren!", "executable": setup},
    "close": {"help": "Mit diesem Befehl kannst du das aktuelle Ticket schließen!", "executable": close}
}

def nf(i, n):
    return str(i).zfill(n)

@client.event
async def on_raw_reaction_add(payload):
    if client.get_user(payload.user_id).bot:
        return
    with open("server.json", "r") as fh:
        server = json.load(fh)

    if not "cur_open_tickets" in server[str(payload.guild_id)]:
        server[str(payload.guild_id)]["cur_open_tickets"] = {}

    if str(payload.guild_id) in server:
        if str(payload.message_id) == str(server[str(payload.guild_id)]["settings"]["msg_id"]):
            channel = client.get_channel(int(server[str(payload.guild_id)]["settings"]["channel_id"]))
            msg = await channel.fetch_message(int(server[str(payload.guild_id)]["settings"]["msg_id"]))
            member = client.get_user(payload.user_id)
            category = channel.category
            guild = client.get_guild(payload.guild_id)
            supportRoles = server[str(payload.guild_id)]["settings"]["support_roles"]

            pings = ""
            await msg.remove_reaction(payload.emoji, member)

            for ticket_count_ in server[str(payload.guild_id)]["cur_open_tickets"]:
                member_id = server[str(payload.guild_id)]["cur_open_tickets"][ticket_count_]
                if member.id == member_id:
                    return

            overwrites = {
                        member: discord.PermissionOverwrite(read_messages=True, send_messages=True),
                        guild.default_role: discord.PermissionOverwrite(read_messages=False, send_messages=False)
                          }

            for roleId in supportRoles:
                role = guild.get_role(roleId)
                overwrites[role] = discord.PermissionOverwrite(read_messages=True, send_messages=True, manage_channels=True)
                pings += role.mention + " **|** "

            pings += member.mention

            ticket_count = 0
            channels = category.channels
            for channel in channels:
                if channel.name.startswith("ticket-"):
                    ticket_count += 1


            ticket_count = str(nf(ticket_count, 4))

            ticket_channel = await guild.create_text_channel(name="ticket-" + ticket_count, overwrites=overwrites, category=category)

            ticket_embed = discord.Embed(title="Willkommen im Ticket System, " + member.name + "#" + member.discriminator, description="Stelle einfach deine Frage und jemand wird dir versuchen zu helfen!\n\nSupporter könenn den Befehl tt+close nutzen um das Ticket zu schließen!", color=0x00ff00)
            ticket_embed.set_footer(text="TendoTicket System")
            await ticket_channel.send(embed=ticket_embed)

            ping_msg = await ticket_channel.send(pings)
            await ping_msg.delete()

            server[str(payload.guild_id)]["cur_open_tickets"][int(ticket_count)] = member.id

    with open("server.json", "w") as fh:
        json.dump(server, fh, indent=4)




@client.event
async def on_ready():
    await client.change_presence(activity=discord.Game("Tickets überwachen | " + Constants.PREFIX + "help für mehr Hilfe!"))
    print("TendoTicket ist nun fertig gestartet!")

@client.event
async def on_message(message):
    if message.author == client.user or message.author.bot:
        return

    if message.content.startswith(Constants.PREFIX):
        invoke = message.content[len(Constants.PREFIX):].split()[0]
        args = message.content.split()[1:]

        if invoke.lower() in commands:
            today = datetime.datetime.now().strftime("%d.%m.%Y %M:%H")

            print(f"\nCommand: {invoke}\nUser: {str(message.author)}\nServer: {message.guild.name} ({message.guild.id})\nZeit: {today}")
            await commands[invoke]["executable"].ex(args, message, client, invoke)

client.run(Constants.TOKEN)


print("Development")