Explore text analytics Learn Module giving errors

Question

I am working on the Explore text analytics Lab in Learn and I was following the numbers: Create a Cognitive Services resource

Run Cloud Shell

Configure and run a client application

It should be reviewing a block of text and output sentiment scores

However when I ran ./analyze-text.ps1 review1.txt, which was given to me from the Lab exercise i got this error: help me Obi-wan, you're my only hope.

PS /home/lawrence/ai-900> ./analyze-text.ps1 review1.txt
***Detecting Language***                                                                                                
Invoke-RestMethod: /home/lawrence/ai-900/analyze-text.ps1:30
Line |
  30 |  $result = Invoke-RestMethod -Method Post `
     |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Name or service not known
ConvertFrom-Json: /home/lawrence/ai-900/analyze-text.ps1:35
Line |
  35 |  $analysis = ($result | ConvertFrom-Json)
     |                         ~~~~~~~~~~~~~~~~
     | Cannot bind argument to parameter 'InputObject' because it is null.
  - Language: 
  - Code: 
  - Score: 


***Finding Key Phrases***
Invoke-RestMethod: /home/lawrence/ai-900/analyze-text.ps1:54
Line |
  54 |  $result = Invoke-RestMethod -Method Post `
     |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Name or service not known
ConvertFrom-Json: /home/lawrence/ai-900/analyze-text.ps1:59
Line |
  59 |  $analysis = ($result | ConvertFrom-Json)
     |                         ~~~~~~~~~~~~~~~~
     | Cannot bind argument to parameter 'InputObject' because it is null.
  - Key Phrases: 


***Analyzing Sentiment***
Invoke-RestMethod: /home/lawrence/ai-900/analyze-text.ps1:80
Line |
  80 |  $result = Invoke-RestMethod -Method Post `
     |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Name or service not known
ConvertFrom-Json: /home/lawrence/ai-900/analyze-text.ps1:85
Line |
  85 |  $analysis = ($result | ConvertFrom-Json)
     |                         ~~~~~~~~~~~~~~~~
     | Cannot bind argument to parameter 'InputObject' because it is null.
  - A  sentiment based on these scores:
    - Positive: 
    - Neutral: 
    - Negative: 


***Identifying known entities***
Invoke-RestMethod: /home/lawrence/ai-900/analyze-text.ps1:106
Line |
 106 |  $result = Invoke-RestMethod -Method Post `
     |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Name or service not known
ConvertFrom-Json: /home/lawrence/ai-900/analyze-text.ps1:111
Line |
 111 |  $analysis = ($result | ConvertFrom-Json)
     |                         ~~~~~~~~~~~~~~~~
     | Cannot bind argument to parameter 'InputObject' because it is null.
InvalidOperation: /home/lawrence/ai-900/analyze-text.ps1:113
Line |
 113 |  $entities = $analysis.documents[0].entities
     |  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Cannot index into a null array.