If the Artwork Tab is not showing in Control, check the following:
Ensure you are viewing a Order or Estimate.
Ensure the Order or Estimate is not in Edit mode.
Check the CHAPI Service and ensure user is running as is *Local System* and not as *.\chapi*
Check the name column in the CHAPI.DatabaseRecs table. It can not be null.
Check for the CEF folder and files in the Cyrious\Control folder.
Further Troubleshooting:
Hit F12 with the tab open
then hit F5 on the console window with the network tab open it will then issue a request to load the order,
click on that request and it will tell you where it's trying to load the tab from (artaddress)