To use this component, you must register your environment for an API key with Adobe here:

https://www.adobe.io/apis/documentcloud/dcsdk/gettingstarted.html

When registering, select the PDF Embed API (Unlimited for free)

In the Adobe console:

1. Create a new project
2. Add API Key
3. Select PDF Embed API, then next
4. Enter the domain you wish to use the component in e.g. abcdef.outsystemscloud.com
5. Save
6. Copy the API Key

once you have registered your API, Copy the Key and head over to Service Center

1. Open the Site properties for the module AdobePDFEmbedAPI 
2. Paste the API key to AdobeClientID