『LINE Messenger API を使用してリッチメニューの作成を行いたい。(Python)』

前提・実現したいこと

PythonでLINE Messenger APIを用い、リッチメニューを作成を試みているのですが、どうしてもRichMenu()関数を呼ぶことができません。
どなたか教えて下さい。。

発生している問題・エラーメッセージ

リッチメニューが表示されない。

エラーメッセージ

該当のソースコード

Python
1from flask import Flask, request, abort
2
3from linebot import (
4    LineBotApi, WebhookHandler,
5)
6from linebot.exceptions import (
7    InvalidSignatureError
8)
9from linebot.models import (
10    FollowEvent, UnfollowEvent, MessageEvent, PostbackEvent,
11    TextMessage, TextSendMessage, TemplateSendMessage,
12    ButtonsTemplate, CarouselTemplate, CarouselColumn,
13    PostbackTemplateAction,
14    RichMenu, RichMenuArea, RichMenuBounds, RichMenuResponse, RichMenuSize,MessageAction,URIAction, 
15)
16
17from time import time
18import urllib.request, json
19
20app = Flask(__name__)
21
22line_bot_api = LineBotApi('1mqtNHrV5cUgij7aIYbar+gEDVmfr0ZldHnvL+kG22mNTE2Ae/MU6wqt9E6WmUg1Qt31WUpDQsgVNqHkKhlJJJ/c6TuuphCtPhjuXnqZLo+OdcIV1bTRxULA7IW3QyUJd3gX+p9/vmNyMdTrCRQkKQdB04t89/1O/w1cDnyilFU=')
23handler = WebhookHandler('526bae9674105674aae217b7f5e37f6e')
24
25'''
26@app.route("/")
27def test():
28    return "OK"
29'''
30
31
32@app.route("/callback", methods=['POST'])
33def callback():
34    # get X-Line-Signature header value
35    signature = request.headers['X-Line-Signature']
36
37    # get request body as text
38    body = request.get_data(as_text=True)
39    #app.logger.info("Request body: " + body)
40
41    # handle webhook body
42    try:
43        handler.handle(body, signature)
44    except InvalidSignatureError:
45        print("Invalid signature. Please check your channel access token/channel secret.")
46        abort(400)
47
48    return 'OK'
49
50
51#メニューの作成
52#@handler.add(FollowEvent)
53def createRichmenu(event):
54    reply_message(event, TextSendMessage(text= "ここまでは来たね。"))
55    # define a new richmenu
56    rich_menu_to_create = RichMenu(
57        size=RichMenuSize(width=2500, height=843),
58        selected=False,
59        name="Nice richmenu",
60        chat_bar_text="Tap here",
61        areas=[RichMenuArea(
62            bounds=RichMenuBounds(x=0, y=0, width=2500, height=843),
63            action=URIAction(label='Go to line.me', uri='https://line.me'))]
64    )  
65
66    reply_message(event, TextSendMessage(text= "設定もできてる！"))
67
68    rich_menu_id = line_bot_api.create_rich_menu(rich_menu=rich_menu_to_create)
69
70    reply_message(event, TextSendMessage(text= rich_menu_id))
71
72    # upload an image for rich menu
73    path = '/Users/masaki/Desktop/開発/LINE_Bot/ugaku-menu.jpeg'
74
75    reply_message(event, TextSendMessage(text= "画像は設定できるかな?"))
76
77    with open(path, 'rb') as f:
78        line_bot_api.set_rich_menu_image(rich_menu_id, "image/jpeg", f)
79
80    # set the default rich menu
81    line_bot_api.set_default_rich_menu(rich_menu_id)
82
83
84
85#カルーセルの通知
86def show_carousel(user_id):
87    carousel_columns = [
88        CarouselColumn(
89            text=value,
90            title=value+'の通知',
91            actions=[
92                PostbackTemplateAction(
93                    label='ON',
94                    data=value+'1'
95                ),
96                PostbackTemplateAction(
97                    label='OFF',
98                    data=value+'0'
99                )
100            ]
101        ) for key, value in (
102            zip(
103                ('A', 'B', 'C', 'D', 'E'),
104                ('Binance', 'KuCoin', 'Hupbipro', 'Poloniex', 'Bittrex')
105            )
106        )
107    ]
108    message_template = CarouselTemplate(columns=carousel_columns)
109    line_bot_api.push_message(
110        to=user_id,
111        messages=TemplateSendMessage(alt_text='carousel template', template=message_template)
112    )
113
114
115#通常メッセージ送信
116@handler.add(MessageEvent, message=TextMessage)
117
118def handle_message(event):
119    print("start")
120    if event.message.text == "FAQ":
121        reply_message(event, TextSendMessage(text= "何にお困りですか？以下の項目からお選びください。"))
122    
123    #elif event.message.text == "button":
124    #    send_button(event, event.source.user_id)
125    
126
127    elif event.message.text == "menu":
128        createRichmenu(event)
129
130    elif event.message.text == "Carousel":
131        show_carousel(event.source.user_id)
132
133    else:
134        reply_message(event, TextSendMessage(text= event.message.text))
135
136
137
138
139def reply_message(event, messages):
140    line_bot_api.reply_message(
141        event.reply_token,
142        messages = messages,
143    )
144
145
146
147if __name__ == "__main__":
148    app.run()