SAP - UI API Server is unavailable; the installation process will not start

  1. Open Task Manager and kill the existing "SAPbouiCOM.exe" processes.
  2. Go to Control Panel->Administrative Tools->Component Services, locate "SAPbouiCOM" and right-click to choose Properties:
  3. On the Identity tab, choose The launchig user, and click Apply
  4. Open SAP Business One with a different user again. Now the "SAPbouiCOM.exe" process is supposed to run with the same session ID as the "SAP Business One.exe" process