Drupal 8.x

I am trying to write a FQDN path to a image in my theme directory within a Views custom text box.
My install of Drupal is in a sub-directory so relative paths do not work correctly.
Here is what I have in my Views custom text box.

I want to create a module to store images to Third-party servers. I created a custom StreamWrapper class and implements the StreamWrapperInterface. But when I debug this class, I found the function setUri cannot get the file URI.
I don't know what is happening here. What should I do and how can I solve it?
I implements the function setUri:

public function setUri($uri) {
    $this->uri = $uri;
}

I am having a problem with our site iloveyoujenn.com receiving an error when trying to get to the login page.
I receive an ERR_CONNECTION_REFUSED when trying to access the login page. Not really sure what to do since I am fairly new to Drupal. Any help is greatly appreciated.

Yet another question,

The examples I am finding are from the dev versions of D8 and it looks like things have changed. Also I am totally new to OO programming and going hu? a lot, and not to sure with what I am looking at all the time.

The error I am getting is saying (I think) that I did something that violates the buildForm() function?

Also I have no idea what

Hi there,
it's me again the drupal n00b...
after installing and enabeling the registration-8.x-1.x-dev module, i got the following message:
>>>
Fatal error: Call to undefined function drupal_get_schema_unprocessed() in *:\xampp\htdocs\*****\modules\registration\registration.install on line 345
<<<
Okay, maybe it's alright, but i didn't find the
/admin/structure/registration/registration_types
in structure either.

• Advisory ID: DRUPAL-SA-CONTRIB-2016-007
• Project: Node.js integration (third-party module)
• Version: 7.x, 8.x
• Date: 2016-February-17
• Security risk: 13/25 ( Moderately Critical) AC:Basic/A:None/CI:Some/II:None/E:Theoretical/TD:All
• Vulnerability: Information Disclosure