I am currently trying to set up the Google Cloud Vision API via an extension in Airtable. When adding the API key, I am currently getting the following error:

'Cloud Vision API is not enabled. Enable the API.'

However, I have followed all the steps required for the API to work:

1. Created a Google Cloud project 

2. Set up billing 

3. Enabled the Google Cloud Vision API, added it to my project and generated an API key.

I am still getting the error message despite having disabled and enabled again, removed and re-added the extension and deleted and re-created an API key.

I would be grateful for any additional suggestions regarding how I can add this extension.

Many thanks,

Jamie