The app is blank or shows a connection error – Applaud Support

When launching either the desktop or mobile app, you see a blank screen, or it shows the error message, "Oops, looks like the connection to the server isn't working right now."

Does this only happen in Internet Explorer?
- If the app works fine in Chrome or Firefox, this is likely related to the network team forcing the IE emulation mode to an older version. Please ensure you have the January 2017 (v3007) patch or later, which will ensure the IE emulation mode is correct.
Are the REST APIs running?
- To validate this, run the following URL in your browser (replacing the red variables with their correct values):
  http(s)://<myHost.myDomain>:<myPort>/OA_HTML/applaud/api/
  
  For example:
  
  http://ebshost.ebsdomain.com:8000/OA_HTML/applaud/api/
  
  or
  
  https://ebshost.ebsdomain.com/OA_HTML/applaud/api/
  
  You need to include the trailing slash (/); it won't work without it.
  
  If this is working fine, it will return output in JSON format. Internet Explorer and some other browsers will download the JSON data to a file; in other browsers, it may show inline. Either way, the inline content or downloaded file will look similar to the below (but with different content):
  
  If this returns an error, such as a 404 not found or a blank screen, the REST APIs are not running. In this case:
  - If running Oracle E-Business Suite release 12.2 +, ensure that you have completed the 12.2 specific steps to allow the JSPs and servlets. See knowledge base article, 12.2+ specific instructions (R12.2+ users only).
  - Check that standard Oracle applications are running fine (that you can log in and access standard Oracle functionality)
  - Check that the REST API servlets have been deployed. Please refer to the Knowledge Base article REST services troubleshooting.
  - Finally, check that there are no firewall blocks to the /OA_HTML/applaud/api* (and others). Again, please refer to the Knowledge Base article REST services troubleshooting for more details.