My Setup:
FME 2021.2
ArcGIS Desktop 10.8 advanced, 64bit backgroundGP
Python 2.7 (C:\\Python27\\ArcGIS10.8 and C:\\Windows\\SysWOW64\\python27.dll)
ArcGIS Pro 2.9.3
Python 3.7 (C:\\Program Files\\ArcGIS\\Pro\\bin\\Python\\envs\\arcgispro-py3)
FME Workbench uses py 2.7 scripts (GeoScaler).
ESRI ArcGIS Compatibility: Auto
Python Compatibility set to Esri ArcGIS Pyton 2.7
ArcGIS Desktop started in advace to get the license from the server.
Workbench run stops with an error:
ERROR : A compatible ArcGIS application could not be found or is not licensed for Python Compatibility 'Esri ArcGIS Python 2.7'ERROR : FME supports Python 2.7 and Python 3.6 to 3.8. A compatible ArcGIS Python within the supported range could not be found. Please ensure a proper ArcGIS is installed with an architecture matching FME's
A Python interpreter could not be loaded. Please ensure the workspace `Python Compatibility` is set to an available Python version
Program Terminating
Translation FAILED.
I have no idea.