Issue with Service that i Created

Having Issue with Service that i Created.

 gunicorn --bind 0.0.0.0:5000 wsgi:application  

This works well no issue at all.

But with the Service, I get an error.

[Unit]
Description=Gunicorn instance to serve lolf
Wants = network-online.target
After = network.target network-online.target

[Service]
User=lolfbwu1
Group=www-data
WorkingDirectory=/home/lolfbw/lolf
Environment="PATH=/home/lolfbw/lolf/lolfenv/bin"
ExecStart=/home/lolfbw/lolf/lolfenv/bin/gunicorn --workers 3 --bind unix:lolf.sock -m 007 wsgi

[Install]
WantedBy=multi-user.target

Error i am getting:

gunicorn[27945]:     final_start = datetime.fromisoformat(formated_start).timestamp()

gunicorn[27945]: ValueError: Invalid isoformat string: ' 00:00:00'

But I don’t get this error when running it as

>>  gunicorn --bind 0.0.0.0:5000 wsgi:application  

Any Idea why is that?

I am using Python3.9.