Development on MWA stopped years ago. You are of course, free to fix it for your own usage, or move to Steve Kueng's MWA fork, or move to Sal or MunkiReport-PHP.
But there will be no further updates to the reporting bits of MunkiWebAdmin.
MunkiWebAdmin2 is available for testing, but drops all reporting -- it only supports web-based editing of pkginfo and manifest items.
https://github.com/munki/mwa2
-Greg