I\'m just setting up a cron tab/job on my Cent OS developement server.
Within my crontab I have the following. (Ignore the time setting, this was added about 15:32 UTC s
Try using absolute paths in your crontab command:
34 15 * * * cd /foo/bar/welcomeclient-0.0.5 && /usr/bin/python3.6 main.py
or, assuming the main.py does not also make use of relative paths inside of it :
34 15 * * */usr/bin/python3.6 /foo/bar/welcomeclient-0.0.5/main.py