Can't register Kirby and keep logout on production environment

[jesuismaxime]

I try to register a production installation through the top-admin-bar. Enter the correct key and email then clic Register. The form close, the green notice appear on top but no sign of the language selector (api/system response for register return {"status":"ok"}). Hit refresh and this is when the issue happens. Half time the 'Register / Buy a licence' buttons are back and the other half I got logout. When I login again, the 'Register / Buy a licence' buttons are also back.

The other part of the issue : even if a didnt try to register the installation, if I hit 'Refresh' I'm log out.

I double check, the prod and dev (which is ok) and the setup are the same (PHP version and extensions. The only difference is the htaccess force-SSL. But even if I remove this part bellow, the issues keep happening.

# Force SSL
RewriteCond %{HTTPS} !=on
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301,NE]

# Safe redirect to non-www (with SSL)
RewriteCond %{HTTPS} on
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ https://%1/$1 [R=301,L]

Is there a way to create a file manually like Kirby2 in the /config directory or something ?

EDIT: I look into my /config directory and the .licence file has been created, so its not about it.

Kirby Version 3.1.2

Console output If you are working with the panel, please check the browser console for errors and send the output.

Desktop (please complete the following information):

• OS: macOS
• Browser: test with Safari and Chrome
• Version: lastest versions

[lukasbestle]

Please try clearing your browser cache and your session cookie and then try again.

[lukasbestle]

Oh, I see there's already a forum thread about this. Closing this here.