We have identified an issue currently whereby some customers are unable to make changes in the Cisco Meraki dashboard. Our teams are currently actively working to resolve this issue. As a workaround to avoid this issue please review addresses populated on devices in your dashboard based on the invalid characters shown in the error message received when attempting to save.
We are aware of an issue with Dashboard where some customers may be having issues using the Live Tools and/or viewing live data regarding their network devices. We are actively triaging the issue, and will post an update when we know more.