The tutorial teaches how to request a Theia runner embedded with a software (html5as-base for example), which means when you request a Theia service, you are supplying and requesting a software too. 

If you want a pure theia, you can follow HowTo Request A Theia Runner. 

Access the panel via panel.rapid.space. The Services page is here for you.

Now you are in the "Services" page. On the page's navigation bar, you can find a button "Add", click it, you will enter a workflow which will create a software.

The first stage is: 1/3 Select one Software. Here you will see a list which contains some softwares, choose "SlapOS IDE (using Theia)" and click.

You will enter the second stage: 2/3 Select one Release. Select the latest version of Theia (1.0.295 for example).  

Now you are in the third stage: 3/3 Request Service: Webrunner theia. Input a title for your theia.

As you want to have a Theia embedded with html5as-base software, you can input the Initial Embedded Instance Configuration:

{
  "software-url": "https://lab.nexedi.com/nexedi/slapos/raw/master/software/html5as-base/software.cfg"
}

You can also input other software URL to deploy it on Theia.

Click “Proceed”, wait a bit. 

In the "Services" page, you can find the Theia you just requested. Click and enter, wait until the "instance" button becoming green. You will find more details about your Theia.

After requesting the service, wait for a few minutes (refreshing your page) until your url shows up in the Connection Parameter table. It is the URL for your Theia Frontend. The username and password are your login information.

Login into your Theia via url with username and password.

You can open a Terminal via the button from the toolbar or press ctrl+shift+`.  Then you can type:

slapos proxy show

in your Terminal to inspect the information of your software and instance.