Widget shows the site’s page

Hi, I have the same problem as in the topic below
https://www.ads-software.com/support/topic/instead-of-channel-widget-shows-the-website/
I’ve tried the offered solution but it didn’t work, the widget still doesn’t show my Telegram Feed. Maybe you can advise any other solution that might help?

The page I need help with: [log in to see the link]