Can't Sync - Icon is Greyed Out (Insync 1.5.7.37371)

I have been using Insync for the last 3 years and starting this week I can’t sync my files. The icon is greyed out and once and a while it will flash the syncing icon, but it only lasts for a second at a time. I have uninstalled, re-installed, removed account… I can’t get it to work. Any help would be greatly appreciated. Thanks.

Windows 10 Home Edition