Can't add new page in site structure

Hi

I hope someone can help me with this problem:

We previously had a Contao solution working fine, but recently I can't add any new pages to the site structure.

I can fill out all information about the new page, but when I click "save and close" the site downloads the main.php file instead of submitting the changes. I then nothing happens.

There is no problems with adding new articles or elements.

The Contao solution is 2.11.2

I really need some help here...

Please try to do system-maintenance, than update to 2.11.6. Make sure you are using the latest .htaccess.default renamed to .htaccess. Come back if it not works.

Don't forget to save your template folder if you made changes

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Hi guys, thanks for the help.

However this does not solve the problem, so I would appreciate if you have any more suggestions or could point med in the right direction :)

I have done a system maintenance, updated to 2.11.6 and used the latest .htaccess file...

Did you change something in the settings / default access rights ? Make sure owner is granted to do everything

Did you try to run Contao in debug mode? Or did it also happen within a new installation? Did you try different browsers?