Flux Webhook returning 400

[bojanraic]

My flux webhook keeps returning 400. I configured it on Github repo side, including /hooks/<secret_value>, same as was displayed in the Receiver status and it seemed fine. I used application/json as content type and tried with and without an explicit Secret value set to the same <secret_value> as above. In all those cases, a push event results in a 400 code and nothing is synced/reconciled as a result.
I'm running out of ideas of what to double check or change to get it working so any suggestions are very welcome.
Thanks!

[onedr0p]

Did you switch to the production acme servers as explained in the README?

[onedr0p]

Are you able to access echo-server internally and externally?

[bojanraic]

Yup. I've accessed various external ingresses from other networks, including mobile networks/internet. Certificates seem to be working fine.
I'll mess around with it some more tomorrow as it is late already.
I will gladly try any other suggestions and report back tomorrow. Thanks for helping!

[onedr0p]

Not sure what the issue could be, maybe cloudflare is blocking it? Do you have any firewall rules there?

[bojanraic]

Sigh... it was a PEBKAC situation...
I somehow managed to mess up the webhook token value in the webhook UI. Re-entered it correctly and voila!
Apologies for the inconvenience and thanks for your help!