post requests not getting through

[v.]

hi,
I am trying to get an application I wrote (and which works fine on another server) to work in my old NAS.
I am trying to figure out why my post requests are not working as they should.
My forms all have:

<form action="{{ @BASE }}" method="post" class="form-horizontal">

which seems to be working just fine on my hosting company's server.
When I use this on my NAS the form does not get posted as a POST request.
Changing the action to empty (action="") does work.
I assume this is because the form gets posted to it's own page, so it is a routing issue?
However, when I do the same thing on the index page of the website (which corresponds to the @BASE if I understand correctly), the same thing happens: the form is not posted, I can only get the $_GET parameters.
What could be causing this? What is the proper way to post the form?

My NAS has php 5.6, while the webserver on my hosting account has php7.0.

[ved]

What does @BASE resolve into on each server?

Are the fields always posted when leaving the action empty?

Why even use @BASE on form actions and not just leave all action's empty when posting to the same page ?

[v.]

Hi,
@BASE points to the root page of the site.
html5 specifies that action can not be empty:
https://dev.w3.org/html5/spec-preview/form-submission.html:

The action and formaction content attributes, if specified, must have a value that is a valid non-empty URL potentially surrounded by spaces.

I only now understand that you can possibly just leave the action out all together.

[richgoldmd]

If you're posting to the same page that generated the form you can omit the action attribute.

Also, make sure the route includes POST as an acceptable method. 

If you use action="{{@BASE}}" you going to get the post at the / route, but if your app is not in a subfolder, @BASE may be empty, in which case your action="" may be invalid HTML5