Quote from yssarilany errors? it works fine on my end. when you go to the config does the mount show up in the priorities list? also what locale are you using?
if its not enUS then it may fail the can fly check.
check the local file for your locale and make sure that all the translations for the zones under --======Special locations======-- are translated correctly
edit: committed a fix for the options.lua line 284 error shouldn't have impacted functionality just options
enUS, no errors were popping up, and mounts were showing in the priority list.
Updated to 1.0.2 and the problem is now fixed it appears to be detecting [flyable] correctly now.