There is a bot, posted on timeweb, on the hosting itself a free Let's Encrypt certificate has been received. Setwebhook ends in success:
Webhook was set
although I guess that this message does not guarantee a successful webhook installation.
If you check for updates via getUpdates (before Setwebhook, of course), then all updates come normally. But after installing the webhook, in response to the Telegram silence.
getWebhookInfo says that
"url":"https://тут мой url.index.php","has_custom_certificate":false,"pending_update_count":17,"last_error_date":1511886170,"last_error_message":"Wrong response from the webhook: 404 Not Found","max_connections":40.
The certificate is verified to https://www.ssllabs.com/ssltest/analyze.html with success.