Seeing this error in the log since upgrading to the deluge 2.0 version:
2019-06-19 00:33:39,400 DEBG 'watchdog-script' stderr output:
/home/nobody/deluge.sh: /home/nobody/config_deluge.py: /usr/bin/python2: bad interpreter: No such file or directory
I changed the shebang on line 1 to "#!/usr/bin/python3" and modified the print statements to be python3 compatible and all is working.