Hi there,
Welcome to the Community. It's vital you get the support you need and I'll be happy to steer you in the right direction.
When it comes to the error you've described, I recommend checking your employees to see if there are any showing errors. There may have been changes made to an employee(s) that's causing the syncing error. In case this issue persists, I recommend getting in touch with our phone support team so they can take a closer look at your account and assist you further.
In the meantime, feel free to ask other questions in the comments below. I'm here to help.