This issue has now been resolved and all PPS Hosted users should be able to send SMS messages again. We apologise again for any disruption this may have caused.
We've identified the problem and we're working to resolve it.
We're currently investigating the problem and working as quickly as possible to resolve it.
Our team are investigating an issue which has been preventing some PPS Hosted users from sending SMS messages via the system. Please accept our apologies for any inconvenience as we work to restore this functionality as soon as possible.