Bad info disregard
Do you still have daily.sh running in your cron? If you used an older version of LibreNMS to create your librenms cron file the directions for switching to the dispatcher service can be a bit confusing because it doesn’t have the comments that the new file has.
See: https://github.com/librenms/librenms/blob/master/librenms.nonroot.cron
If that’s not it, and assuming your cron jobs are running nonroot and update as the librenms user, you might try adding:
export http_proxy=http://user:password@proxy/
export https_proxy=http://user:password@proxy/
To your librenms user’s ~/.bash_profile and ~/.bashrc files.