santiagobiali Strange... I've just created an account and this is the confirmation mail :

Hey test!

Someone (hopefully you!) has signed up to Trace de Trail - Le forum with this email address.

If this was you, simply click the following link and your account will be activated:
http://www.tracedetrail.com/forum2/flarum/confirm/Jk4eMyNTBzZwvc8wtxBaBKYH2WpdBZsMJkJ7QjWE

If you did not sign up, please ignore this email.

I checked my config file and the url is ok.

      santiagobiali Trailou hmm ditto

       Hey test25!

Someone (hopefully you!) has signed up to Trace de Trail - Le forum with this email address.

If this was you, simply click the following link and your account will be activated:
https://www.tracedetrail.com/forum/flarum/confirm/Et70t9AruOykg9i9gE3k9BgsigHL8eoCcv018bBF

If you did not sign up, please ignore this email.

            Trailou And I tried without ssh :

            Suddenly that part makes a lot more sense 😉

            You mean https, not ssh 😉

              Trailou what does your config.php file say?
              eg

                'url' => 'https://www.domain.tld',

                I tried

                'url' => 'http://' . $_SERVER['HTTP_HOST'],

                according to @santiagobiali advice but no luck.

                Here is my config.php :

                <?php return array (
                'debug' => true,
                'database' =>
                array (
                'driver' => 'mysql',
                'host' => 'db6116555.db.1and1.com',
                'database' => 'database',
                'username' => 'username',
                'password' => 'password',
                'charset' => 'utf8mb4',
                'collation' => 'utf8mb4_unicode_ci',
                'prefix' => '',
                'strict' => false,
                ),
                'url' => 'https://www.tracedetrail.com/forum/flarum',
                'paths' =>
                array (
                'api' => 'api',
                'admin' => 'admin',
                ),
                );

                  @Kulga No answer yet from my hoster...

                  I also tried to install flarum in the root of my webspace in a forum directory. I create a subdomain forum.tracedetrail.com for that.
                  After installing composer project, I get this error :

                  Parse error: syntax error, unexpected 'finally' (T_STRING), expecting catch (T_CATCH) in /homepages/6/d296193771/htdocs/forum/flarum/vendor/flarum/core/src/Foundation/Application.php on line 119

                  when I go to this web page http://forum.tracedetrail.com/forum/flarum/ to finish installation.

                  Thank you again for your help !

                    @luceos You're right, by default, my hoster put the v 5.4 for this subdomain ! I'ts corrected...

                      The installation is ok, but same issue when I start a discussion :-(

                      POST discussions 401 Unauthorized forum.tracedetrail.com

                        Kulga And for this installation, I didn't change default htaccess in Flarum directory.

                          Trailou
                          Is it possible to make it accessible at forum.tracedetrail.com rather then forum.tracedetrail.com/forum/flarum? (or even forum2.tracedetrail.com)
                          Making sure your config.php reflects this.
                          Being in a subfolder has caused issues in the past - trying to isolate the problem.

                              Kulga It's done : the forum is accessible at http://forum.tracedetrail.com/
                              I changed my .htaccess (RewriteBase / added), but I get always the same issue :

                              POST discussions 401 Unauthorized forum.tracedetrail.com