The command may not be greater than 200 characters.
To give an example, here is the command that I have to run:
PM2_HOME=/home/ploi/.pm2 SSL_CERT=/etc/letsencrypt/live/site.com/fullchain.pem SSL_KEY= /etc/letsencrypt/live/site.com/privkey.pem soketi start --conifg=/home/ploi/site.com/soketi.json
It is over 200 characters.