WebHook Invalid URL error

[Andrey_A]

Hi!

At November 7th I got an e-mail "Your webhook endpoint failed to respond to our validation request".

WebHook was working good before. And the "Event notification endpoint URL" is valid on my server. But I got an error "Invalid URL" when I traying to save Event Subscriptions in my Server-to-Server OAuth app.

Could you please help me?

[Andrey_A]

It's solved. It was a provider's DNS problems...