Laravel Framework 5.7.29 blank main page - laravel

Question

I was having problems with a blank page in my first Laravel project. I'm currently watching the Laravel Framework course on YouTube. This is Lesson 1 called "How to install the Laravel Framework". I checked it out laravel.com for the requirements section and made sure I have all of them. After that, I installed Composer 2.0.13. Using it, I installed Laravel Framework 5.7.29. I got reports that some packages are deprecated. They were about changing the color on the console.
The next step was to change "/etc/hosts". I added the line 127.0.0.1 poligon.local The next step was to change "/opt/lampp/etc/extra/httpd-vhosts.conf". I added the lines:
<VirtualHost *:80>
ServerAdmin admin#example.com
DocumentRoot "/home/stas/projects/poligon.local/public"
ServerName poligon.local
ServerAlias www.poligon.local
<Directory /home/stas/projects/poligon.local/public>
Options Indexes FollowSymLinks
AllowOverride All
Order Allow,Deny
Allow from all
Require all granted
</Directory>
ErrorLog "logs/poligon-error.log"
CustomLog "logs/poligon-access.log" common
</VirtualHost>
Then I wrote $ sudo /opt/lampp/lampp start to start the local XAMPP server. And I have a blank page on the "poligon.local/". When I started php artisan serve, I had access to "poligon.local:8000", and there is the Laravel home page. But the author of the video got access to the "poligon.local" without php artisan serve. What do you think is my mistake?
Update: If I create /public/index.html I will get this html page.
Update2: I was experimenting now with php artisan serve --host 127.0.0.1 --port 80 and found that with the XAMPP server enabled, this socket is already in use. But when the server is turned off, I manage to run artisan command with these connection settings. As I understand it, XAMPP occupies this socket, but for some reason can't handle it on its own.
Update3: I checked it out /public/index.php the whole file and found out that it is being executed. Up to the line $response = $kernel->handle( $request = Illuminate\Http\Request::capture() ); There is no continuation after it.

Answer 1

Define the site you added in hosts file in the Virtual Host route.
Change this
<VirtualHost *:80>
ServerAdmin admin#example.com
DocumentRoot "/home/stas/projects/poligon.local/public"
ServerName poligon.local
ServerAlias www.poligon.local
<Directory /home/stas/projects/poligon.local/public>
Options Indexes FollowSymLinks
AllowOverride All
Order Allow,Deny
Allow from all
Require all granted
</Directory>
ErrorLog "logs/poligon-error.log"
CustomLog "logs/poligon-access.log" common
</VirtualHost>
to this
<VirtualHost poligon.local:80>
ServerAdmin admin#example.com
DocumentRoot "/home/stas/projects/poligon.local/public"
ServerName poligon.local
ServerAlias www.poligon.local
<Directory /home/stas/projects/poligon.local/public>
Options Indexes FollowSymLinks
AllowOverride All
Order Allow,Deny
Allow from all
Require all granted
</Directory>
ErrorLog "logs/poligon-error.log"
CustomLog "logs/poligon-access.log" common
</VirtualHost>
Notice that i have defined the host URL you defined in the virtual host route
From <VirtualHost *:80> to the url you defined <VirtualHost poligon.local:80>
What this * does is it gets all the requests and direct it to XAMPP homepage which is default.