showup not working

[netwet]

here old code (with streamlink 1.7.0, it was working just last week):

import re
import socket
import struct
import os
import random
import websocket
import ssl
from streamlink.plugin import Plugin
from streamlink.plugin.api import http, validate, utils
from streamlink.stream import RTMPStream
from streamlink.logger import LoggerModule

RANDOM_UID = '%032x' % random.getrandbits(128)
JSON_UID = u'{"id":0,"value":["%s",""]}'
JSON_CHANNEL = u'{"id":2,"value":["%s"]}'
url_re = re.compile(r"http(s)?://(\w+.)?showup.tv/(?P[A-Za-z0-9-]+)")
_websocket_url_re = re.compile(r"socket.connect('(?P[\w.]+):\d+');")
_rtmp_url_re = re.compile(r'{"id":\d+,"value":["joined","(?P.+.showup.tv)"]}')
_channel_id_re = re.compile(r'{"id":\d+,"value":["(?P\w+)"]}')

class ShowUp(Plugin):
@classmethod
def can_handle_url(self, url):
return _url_re.match(url)

def _get_stream_id(self, data):
    channel_id = _channel_id_re.search(data)
    if channel_id:
        return channel_id.group('id')

def _get_websocket_data(self,channel, websocket_url):
    ws = websocket.create_connection(websocket_url)
    if not ws:
        return None
    ws.send(JSON_UID % RANDOM_UID)
    ws.send(JSON_CHANNEL % channel)
    data = ws.recv()
    data += ws.recv()
    return data
    
def _get_websocket(self,html):
    websocket = _websocket_url_re.search(html)
    if websocket:
        return "wss://%s" % websocket.group("ws")
        
def _get_rtmp(self,data):
    rtmp = _rtmp_url_re.search(data)
    if rtmp:
        return "rtmp://{0}:1935/webrtc".format(rtmp.group("rtmp"))
    
def _get_streams(self):
    url_match = _url_re.match(self.url)
    channel = url_match.group("channel")
    http.parse_headers('Referer: %s'%self.url)
    http.parse_cookies('accept_rules=true')
    page = http.get(self.url)
    websocket = self._get_websocket(page.text)
    data = self._get_websocket_data(channel, websocket)
    rtmp = self._get_rtmp(data)
    stream_id = self._get_stream_id(data)
    stream_id_suffix = "%s_aac" % stream_id
    self.logger.debug(u'Channel name: %s' % channel)
    self.logger.debug(u'WebSocket: %s' % websocket)
    self.logger.debug(u'Stream ID: %s' % stream_id)
    self.logger.debug(u'RTMP Url: %s' % "{0}/{1}".format(rtmp, stream_id_suffix))
    if rtmp is None:
        return None
    stream = RTMPStream(self.session, {
        "rtmp": "{0}/{1}".format(rtmp, stream_id_suffix),
        "live": True
    })
    return {'live' : stream}

plugin = ShowUp

here error:

[cli][error] Try 1/1: Could not open stream <RTMPStream({'rtmp': 'rtmp://cdn-t04.showup.tv:1935/webrtc/e4c74df0e_aac', 'live': True, 'flv': '-'}, redirect=False> (Could not open stream: rtmpdump.exe is not installed or not supported on your system)
error: Could not open stream <RTMPStream({'rtmp': 'rtmp://cdn-t04.showup.tv:1935/webrtc/e4c74df0e_aac', 'live': True, 'flv': '-'}, redirect=False>, tried 1 times, exiting