Eikon API request failed. Do you have an Eikon license and Eikon open?

Hi Team, I'm assisting User regarding an error in API.
The client [GESG1-163451] mentioned that it was working two weeks ago.

Troubleshooting Steps Taken:

• Verified workflow:
  • Opened the Workspace application
  • Launched RStudio/API
  • Run the Codes and the error appears "Eikon API request failed. Do you have an Eikon license and Eikon open?"
  • Executed eikon.api::setTRAppID() and entered API Key
  • Ran eikon.api::eikonConnected() → Returns False, though it should be True to confirm API connection
• Checked Data API Proxy:
  • Status shows Ready
  • Client successfully accessed the API Proxy URL
• Ran a system test on the client machine:
  • Confirmed that all necessary links are whitelisted
• Additional steps attempted:
  • Renaming the Workspace cache folder (Issue persists)
  • Generating a new API Key and reconnecting (Issue persists)