You don't need to be on-site, you can remotely access over WAN 1 IP. It's an old video but I think It will help you.
https://www.youtube.com/watch?v=Tf4FeupKRHk
Also, check the IP, mask, default gateway, and try with another DNS.
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
Please, if this post was useful, leave your kudos and mark it as solved.