Jiminny is a web based conference that runs through the browser. If your customer is having an issue connecting to your Jiminny Conference relating to firewalls, they may need to get their IT team to unblock and whitelist Jiminny.
Errors can be related to network connection, network firewall settings or web security gateway settings.
We've written up a guide they can follow to get up and running as soon as possible.
If a large percentage of your customers have firewalls, you may want to add this to your invite template or meeting agenda.