Connect nginx proxy_pass to aiohttp web server

Im trying to connect my nginx proxy_pass to my aiohttp web server
But im keep getting errors

server {
     server_name pyband.ir;
     location /bot {
         proxy_pass https://127.0.0.1:5000;
     }
     location /nextpay {
         proxy_set_header Host $http_host;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_redirect off;
         proxy_buffering off;
         proxy_pass https://127.0.0.1:5001;
     }
}

here is my nginx config
and here is my code :

from aiohttp import web
from aiohttp.web_request import Request

WEB_SERVER_HOST = "127.0.0.1"
WEB_SERVER_PORT = 5001

Router = web.RouteTableDef()

@Router.get('/nextpay')
async def verify(request: Request):
    print(type(request))
    return web.Response(text="Hello, world")

def main():
    app = web.Application()
    app.add_routes(Router)
    web.run_app(app, host=WEB_SERVER_HOST, port=WEB_SERVER_PORT)

if __name__ == "__main__":
    main()

and this is the error im keep getting every time i request on /nextpay :
aiohttp.http_exceptions.BadStatusLine: 400, message="Bad status line 'invalid HTTP method'"