Do you got the correct version?
Got same problem. First when I started windbot it said unsupported tibia client, so I updated tibia. Turns out I was running tibia client from 2 versions ago with bot from 1 release ago... Should have just updated the bot.
Tibia 11 just got another update today, beta.62 was made for yesterdays update
Old 'n Proud Neobot-Elfbot and blackd user