can't open file 'setup'

After installing sudo_flags = -Hi in ansible.cfg, playbooks periodically fall in error:
failed: [host.example.com] => {“failed”: true, “parsed”: false}
BECOME-SUCCESS-crllipfjilsndpnrqbnftwvajxozmned
/usr/bin/python: can’t open file ‘setup’: [Errno 2] No such file or directory
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /var/lib/rundeck/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: auto-mux: Trying existing master
debug1: mux_client_request_session: master session id: 2
debug1: mux_client_request_session: master session id: 2
Shared connection to host.example.com closed.