Teampass 3.1.1 Installation

[JCSR64]

After finish TeamPass installation (following instructions from documentation), when I go to the URL, It shows me a web page with what I understand as some strange outputs, like after Initial Installation, it says: '; if (!isset($_GET['step']) && !isset($post_step)) { //ETAPE O echo '

In fact, if I try to make the initial installation from Microsoft Edge, the return is: