Post is always empty on live server

Additional information:

It seems that the response is sent twice, for example, if I contact the page with curl, I get 2 ci-session cookies.

I know that has been talked about on this forum before, but I checked all the potential missing links, nothing seems wrong.

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Your missing the action attribute.

PHP Code:

<form action="/controller/method" method="post"> 


No, if action is missing, the PHP_SELF page is used. It can't be that because the page is correctly displayed after the form is sent.

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Other new information:

Code:

curl -i https://cramine.ch

returns HTTP/2 200

Code:

curl -I https://cramine.ch

returns HTTP/2 404