Webhooks problem with Let's Encrypt Certificate

[EvolCorr]

Hello,

i have the same problem as in this thread https://community.shopify.com/c/shopify-apps/webhook-response-503-service-unavailable/td-p/1161153

That is, my Webhook endpoint gets never called by Shopify and in the Partner Dashboard logs i see 503 Unavailable on 100% of the calls.

My whole certificate chain seems to be there, as it can be checked on https://www.sslshopper.com/ssl-checker.html#hostname=brandly.co.za

The problem maybe is that the LetsEncrypt's Root CAs are not trusted, and i'd need to get some better certificate like Comodo.

Before buying it, i wanted to ask you: Would that solve the issue with certainty? So is Let's Encrypt to blame ?

Thanks

[EvolCorr]

SOLVED. Actually the SSL chain was not correct.

[Prudentt]

@EvolCorr How did you solve it? My SSL is showing correctly in the ssl checker too