https://www.theregister.co.uk/2018/07/05/sage_outage/

Employees signed up to Sage's 50cloud Payroll service have been having problems accessing their payslips after an update borked servers.

The problem, which appeared to affect a minority of users, began on 25 June. Users, keen to check their latest payslip, found themselves unable to log in, receiving a slightly worrying "Invalid Properties" message.