FYI, I had the same issue when we migrated from PBXAct16 → 17. I opened a ticket with Sangoma report, and the answer was to upgrade to the latest edge modules:
fwconsole ma upgradeall –edge
After that, doing an fwconsole reload and we eventually restarted and it started working. This was also effecting the Queue reports as well.
Also, be sure to check your partitions. By default, they sized the partitions proportionally using the ISO. I had to add additional space to various partitions, in order for the system to work. So, make sure you have space free.
Chris