Drupal 8.x

On some browsers, my https site gives the following error message:

Hi Drupal Community,

i´ve created a custom entity, one of the fields has to be a list of checkboxes, the checkboxes are generated dynamically.

Good Morning,

   I'm starting on working with Drupal and find that it's a bit overwhelming in trying to determine how I shoudl do thing since there is a 1000 way to do anything.

   I was hoping to find someone who could guide me in some general direction and answer questions as time allows.

   For example I know what I want the website to do, but when I thinks something like "OK I want a user to daily track their steps", (Just as an example), I then think...

Hello, i have a problem.

I had an article translated in 5 different languages. I decided to delete the translations and keep only the english content. But even when the translations don't appear in the content dashboard they still appear in the view that i had created. And i don't understand why. Someone can help me? 

Thanks

Due to the Warning “Protecting against HTTP HOST Header attacks”, I set trusted_host_patterns in settings.php according to the instruction.

But after that, I cannot login into the admin-area and just see the following error message, while the website itself is still running :

Hello all,

I've installed Drupal 8.4.2 and now I saw 8.4.3 is available. I followed the steps recommended in "manual update procedure" (so no Drush, no Composer).

However, when going to /update.php, I have:

Verify requirements (done)

Overview (done)

Review updates -> Drupal database update: No pending updates.

I may understand that not all core updates imply database changes but my concern is that going back to Administration -> Reports -> Status report shows that I'm still in 8.4.2.