1st error: A player must have a skill that you added then deleted. 2nd error: Just a guess, but I would say you have a respawn rate wrong in npcpos 3rd error: a mob is dropping s_scroll_of_enchant_armor and s_scroll_of_enchant_weapon, but they do not exist in Itemdata.
Open ur areadata.txt, look for @s_area_death_whisper3 and change it to @s_area_death_wisper3
invalid unittick! at map (25, 14)
look in your areadata.txt search unit_tick=5 and change it to unit_tick=9
for the 3rd one, i cant be sure with out seeing the full error however, it looks like there might be an item calling for skill s_scroll_of_enchant_armor... w/e and it cant find it in the skilldata, if that is what it is, you'll need to remove the skill from the item