It gives an error about trying to concatenate a nil value for progress.
WoWPro_Leveling_Guide line 33.

I'll need to make sure the fix you committed will translate to the working branch, where a lot of the variables are being modified. I'm removing the resolved tag for now, will confirm and upload and merge the branches tomorrow.

Sounds good. That progress was nil when the total was set might indicate other underlying issues too.