Failed to communicate with URL

[raoof (Raoof hojat)]

Hi everyone,

I developed an app for the current monday app challenge, everything worked fine until I publish the app to the server and after debugging I realized monday server can’t connect to my app server webhook url(the app itself is working but not the webhook), it’s working fine locally with localtunnel, I checked everything, even nginx logs, webhook challenge request is not even reaching my webserver and my app relies on the webhook to sync the data

webhook url is:
https://metalogic.nace.io/monday/webhook

[AlexSavchuk]

Hey @raoof

My warmest welcome to the community! I’m sorry to hear this has been giving you some trouble, bu let’s dig deeper together.

That’s quite odd! I’ve just tried sending a random “challenge” to your URL via Postman, and was also not able to get a response, although I’m able to open the link directly:

I would recommend checking your back-end setup. Perhaps the route here isn’t quite right?

-Alex

[raoof (Raoof hojat)]

Thanks @AlexSavchuk, but I can connect with insomnia(another http client like postman)

I created this dns record 3 days ago, is it related? I know server http bindings are correct. can you try to do a dnslookup from your side

[raoof (Raoof hojat)]

@AlexSavchuk I tried with postman just like you,

[AlexSavchuk]

@raoof

Is there a chance this is set up for a local environment only? I’ve just tried Insomnia as well and that didn’t work for me either:

I’m sorry I wasn’t able to point you in the right direction just yet. Are you using a self-signed SSL for this URL by any chance?

-Alex

[raoof (Raoof hojat)]

@AlexSavchuk thanks for finding the issue, no it’s not self signed, I’m using Let’s Encrypt which I think is a trusted issuer, but I could get same error like you when I checked the ssl validation(it was turned of). let me see if I can issue another one. thank you very much

[raoof (Raoof hojat)]

for those who have same issue, the issue was related not to find the CA in cert, the fix is to use Let’s encrypt fullchain.pem instead of cert.pem

[AlexSavchuk]

@raoof

Amazing, I’m glad you were able to find a solution here Thanks for sharing with the rest of the community as well!

-Alex