Job fails on https.

Hello,

I have a shop and I fire the Job at every purchase. Job just zips some files and sends an email to a customer. But when I run it on https domain the job fails. It runs perfectly on a http. I think that the post (queue/receive) causes server error.

Also I have a post request from PayU payment provider with a payment status (similar to queue/receive) and it also fails on https. Here I have a preview of a response and there is 502 Bad Gateway error.

What can I do with this? Any ideas? I don't have any server administration experience. It looks like configuration issue of the server. I use Iron for queueing. I deploy to DigitalOcean via Forge. Laravel ver. 5.2.

Thanks. Michał