This check was newly added as part of appinspect 2.1.0 in order to encourage Python3 adoption over Python2.7 Please include the python.version = python3 in the restmap.conf stanzas. Example: [admin_external:my_settings] handlertype = python handlerfile = file.py handleractions = edit, list python.version = python3 If you still encounter issues, please post your restmap.conf file. ... View more