Hi Tom,
Thanks for coming back.
What I did (3 days ago when I noticed I had an email from my FBX machine saying that new RPM’s were available) was to first upgrade the modules in FBX15 using module admin, then update the RPM’s. The machine was running FBX 15 (a fresh install as of around 3 months ago - and kept up to date on a weekly basis). Interestingly I used the online utility (https://wiki.freepbx.org/display/PPS/Elastix+and+PBXinaFlash+to+FreePBX+Distro+Conversion+Tool) to transfer settings from my FBX 13 machine to my new FBX 15 machine, and this went superbly, takes no time at all and I still have my old FBX 13 machine as a backup - turned off and put away safely of course).
After my FBX 15 module and RPM updates the Admin panel refused to load properly (just lots of code), so I did a chown and a reboot, and all was well…
Note the new machine is an upgraded Sangoma 50 unit (unused from new, updated with an SSD and more memory with a new quite fan).
I believe the RPM updates bought the beta FBX 15 to release candidate 15 (released last week I think). Perhaps that was why the reboot was needed…
Cheers
Dan