If you feel like your data does not sync across devices properly (what you change on your computer, does not get changed on your mobile app etc.) you can do a sync health check to see what is going on with your sync.
To access Sync Health Check, open the menu (☰) in the top-right corner and click on Settings.
In the Settings window, go to the Sync tab where you'll find the "Open Sync Health Check" button.
You'll then see something like this:
Items that have a green check mark are healthy and anything that has a red triangle is causing a sync issue.
In this case there is no Internet Connection so Marvin can't sync.
But there is also something wrong with the user and password account.
As a rule if there is something not OK and you are not sure what it means, scroll down and send us a message through the contact form and we can help out:
Submitting a message through this form automatically sends us you sync health check.
Checking the console for errors
If the Sync Health Check shows sync errors, you can help us diagnose the issue by checking your browser's console and sending us a screenshot. Please follow this guide to open the console and take a screenshot of any error messages.