Laravel - CSRF Token Mismatch - Header Token gets regenerated - laravel

Question

I'm struggeling the last 2 weeks on the following problem:
First of all my problem only occours when I try to deploy my current Laravel (6.11) project on the live server. On my Localhost everything works fine.
In every FORM I used the #csrf tag to set the token as well as the meta tag in the head section of my page. If I search into the developer tool in Chrome the tokens in head and form match perfectly. When the POST request gets sent I get an 419 Page Expired error. I figured out that the HEAD token gets recreated on each request so a token mismatch occours.
I already tried the following things:
Diffrent syntax of the csrf tag
I excepted all FORMS in the VerifyCsrfToken.php - these ended up in a redirect to my index.php without submited form
I checked all Laravel config settings which were recommended in diffrent Forum Posts
I tried a empty laravel installation with a basic login setup on my server - This worked
I currently work with git. On the a previous commit version (16th of december) which I uploaded to my server on that exact Date I had no problem at all but when I tried to reupload the exact same git commit date, the same problem happens.
Greatings Max
If you need any code I'll upload here.
Controller:
function fakeAuthentifizierung(Request $request){
$username = $request->input('benutzernameLogin');
$password = $request->input('passwortLogin');
session(['key' => 'mt171043']);
session(['eingeloggt' => true]);
/*****
* ABFRAGE ADMINRECHTE
* BITTE DIESEN TEIL SPÄTER IN ECHTE AUTHENTIFIZIERUNG ÜBERNEHMEN
*
*/
$admin = false;
// SPÄTER BENUTZERID AUS LOGIN SESSION ÜBERGEBEN
// astmedin5 als TESTZWECK
$rechte = Benutzer::getBenutzerBerechtigung("astmedin5");
//Berechtigung Abfragen
if($rechte->name != 'Student' && 'Lehrbeauftragter'){
session(['admin' => true]);
}else{
session(['admin' => false]);
}
/***
*
* ABFRAGE ENDE
*/
return redirect(route('index',app()->getlocale()));
}
View:
<form method="POST" action="{{ action('LoginController#FakeAuthentifizierung', app()->getLocale()) }}">
#csrf
<h1>{{ __('Login') }}</h1>
<label class="col" for="benutzernameLogin">{{ __('Benutzername') }}</label>
<input name="benutzernameLogin" id="benutzernameLogin" class="inputLogin col mb-4" type="text"
aria-label="Text input with checkbox" placeholder="{{ __('Benutzername') }}" required>
<label class="col" for="passwortLogin">{{ __('Passwort') }}</label>
<input name="passwortLogin" id="passwortLogin" class="inputLogin col mb-4" type="password"
aria-label="Text input with checkbox" placeholder="{{ __('Passwort') }}" required>
<div class="col-8 float-left">
<input id="checkboxPasswortAnzeigen" type="checkbox">
<label for="checkboxPasswortAnzeigen">{{ __('Passwort anzeigen') }}</label>
</div>
<button type="submit" class="btn-slash col-3 inverted fontLight float-right">{{ __('Login') }}</button>
</form>