Local Router Error - Help!

I have been experiencing an ongoing problem with the Local by Flywheel app. The current error I am receiving is the following:

"Local Router Error
Our apologies for the inconvenience. The Local router is not able to connect to the site you requested.

We suggest you try the following:

Restart Site - Go to the Local by Flywheel app and restart the site you are attempting to access.

Contact us - If the issue persists please contact us."

I have tried to resolve this by searching for resolutions on the online forums, updating the app as well as restarting the site to no avail. Any ideas how to resolve this?